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| Meta Title | Current Electricity | Physics | JEE Main Previous Year Questions - ExamSIDE.Com |
| Meta Description | Current Electricity's Previous Year Questions with solutions of Physics from JEE Main subject wise and chapter wise with solutions |
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| Boilerpipe Text | MCQ (Single Correct Answer)
1
Which one of the following is
not
a measurable quantity?
JEE Main 2026 (Online) 28th January Evening Shift
2
JEE Main 2026 (Online) 28th January Evening Shift
3
For the two cells having same EMF $E$ and internal resistance $r$, the current passing through the external resistor $6 \Omega$ is same when both the cells are connected either in parallel or in series. The value of internal resistance $r$ is $\_\_\_\_$ $\Omega$.
JEE Main 2026 (Online) 28th January Morning Shift
4
In the potentiometer, when the cell in the secondary circuit is shunted with $4 \Omega$ resistance, the balance is obtained at the length 120 cm of wire. Now when the same cell is shunted with $12 \Omega$ resistance, the balance is shifted to a length of 180 cm . The internal resistance of cell is $\_\_\_\_$ $\Omega$
JEE Main 2026 (Online) 28th January Morning Shift
5
JEE Main 2026 (Online) 24th January Evening Shift
6
A moving coil galvanometer of resistance $100 \Omega$ shows a full scale deflection for a current of 1 mA . The value of resistance required to convert this galvanometer into an ammeter, showing full scale deflection for a current of 5 mA , is $\_\_\_\_$ $\Omega$
JEE Main 2026 (Online) 24th January Evening Shift
7
A regular hexagon is formed by six wires each of resistance $r \Omega$ and the corners are joined to the centre by wires of same resistance. If the current enters at one corner and leaves at the opposite corner, the equivalent resistance of the hexagon between the two opposite corners will be
JEE Main 2026 (Online) 24th January Evening Shift
8
Two resistors of $100 \Omega$ each are connected in series with a 9 V battery. A voltmeter of $400 \Omega$ resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is $\_\_\_\_$ V.
JEE Main 2026 (Online) 24th January Morning Shift
9
JEE Main 2026 (Online) 24th January Morning Shift
10
To compare EMF of two cells using potentiometer the balancing lengths obtained are 200 cm and 150 cm . The least count of scale is 1 cm . The percentage error in the ratio of EMFs is $\_\_\_\_$
JEE Main 2026 (Online) 23rd January Evening Shift
11
JEE Main 2026 (Online) 23rd January Morning Shift
12
An electric power line having total resistance of $2 \Omega$, delivers 1 kW of power at 250 V . The percentage efficiency of transmission line is $\_\_\_\_$ .
JEE Main 2026 (Online) 22nd January Evening Shift
13
JEE Main 2026 (Online) 22nd January Morning Shift
14
JEE Main 2026 (Online) 21st January Evening Shift
15
JEE Main 2026 (Online) 21st January Evening Shift
16
A battery with EMF $E$ and internal resistance $r$ is connected across a resistance $R$. The power consumption in $R$ will be maximum when:
JEE Main 2026 (Online) 21st January Evening Shift
17
JEE Main 2025 (Online) 7th April Morning Shift
18
There are ' $n$ ' number of identical electric bulbs, each is designed to draw a power $p$ independently from the mains supply. They are now joined in series across the mains supply. The total power drawn by the combination is :
JEE Main 2025 (Online) 4th April Evening Shift
19
From the combination of resistors with resistances values $R_1=R_2=R_3=5 \Omega$ and $R_4=10 \Omega$, which of the following combination is the best circuit to get an equivalent resistance of $6 \Omega$ ?
JEE Main 2025 (Online) 4th April Evening Shift
20
Current passing through a wire as function of time is given as $I(t)=0.02 t+0.01 \mathrm{~A}$. The charge that will flow through the wire from $t=1 \mathrm{~s}$ to $t=2 \mathrm{~s}$ is
JEE Main 2025 (Online) 4th April Morning Shift
21
A motor operating on 100 V draws a current of 1 A . If the efficiency of the motor is $91.6 \%$, then the loss of power in units of $\mathrm{cal} / \mathrm{s}$ is
JEE Main 2025 (Online) 3rd April Evening Shift
22
A wire of length 25 m and cross-sectional area $5 \mathrm{~mm}^2$ having resistivity of $2 \times 10^{-6} \Omega \mathrm{~m}$ is bent into a complete circle. The resistance between diametrically opposite points will be
JEE Main 2025 (Online) 3rd April Morning Shift
23
The battery of a mobile phone is rated as $4.2 \mathrm{~V}, 5800 \mathrm{~mAh}$. How much energy is stored ir it when fully charged?
JEE Main 2025 (Online) 2nd April Morning Shift
24
JEE Main 2025 (Online) 29th January Morning Shift
25
JEE Main 2025 (Online) 28th January Evening Shift
26
JEE Main 2025 (Online) 28th January Morning Shift
27
A wire of resistance R is bent into an equilateral triangle and an identical wire is bent into $a$ square. The ratio of resistance between the two end points of an edge of the triangle to that of the square is
JEE Main 2025 (Online) 28th January Morning Shift
28
A galvanometer having a coil of resistance $30 \Omega$ need 20 mA of current for full-scale deflection. If a maximum current of 3 A is to be measured using this galvanometer, the resistance of the shunt to be added to the galvanometer should be $\frac{30}{X} \Omega$, where $X$ is
JEE Main 2025 (Online) 23rd January Evening Shift
29
JEE Main 2025 (Online) 23rd January Morning Shift
30
JEE Main 2025 (Online) 22nd January Morning Shift
31
Which of the following resistivity ( $\rho$ ) $\mathrm{v} / \mathrm{s}$ temperature ( T ) curves is most suitable to be used in wire bound standard resistors?
JEE Main 2025 (Online) 22nd January Morning Shift
32
JEE Main 2025 (Online) 22nd January Morning Shift
33
JEE Main 2024 (Online) 9th April Evening Shift
34
A galvanometer has a coil of resistance $$200 \Omega$$ with a full scale deflection at $$20 \mu \mathrm{A}$$. The value of resistance to be added to use it as an ammeter of range $$(0-20) \mathrm{mA}$$ is :
JEE Main 2024 (Online) 9th April Morning Shift
35
JEE Main 2024 (Online) 9th April Morning Shift
36
Water boils in an electric kettle in 20 minutes after being switched on. Using the same main supply, the length of the heating element should be _________ to __________ times of its initial length if the water is to be boiled in 15 minutes.
JEE Main 2024 (Online) 8th April Evening Shift
37
JEE Main 2024 (Online) 8th April Morning Shift
38
The number of electrons flowing per second in the filament of a $$110 \mathrm{~W}$$ bulb operating at $$220 \mathrm{~V}$$ is : (Given $$\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$$)
JEE Main 2024 (Online) 6th April Evening Shift
39
JEE Main 2024 (Online) 6th April Morning Shift
40
JEE Main 2024 (Online) 5th April Evening Shift
41
A galvanometer of resistance $$100 \Omega$$ when connected in series with $$400 \Omega$$ measures a voltage of upto $$10 \mathrm{~V}$$. The value of resistance required to convert the galvanometer into ammeter to read upto $$10 \mathrm{~A}$$ is $$x \times 10^{-2} \Omega$$. The value of $$x$$ is :
JEE Main 2024 (Online) 5th April Evening Shift
42
JEE Main 2024 (Online) 5th April Morning Shift
43
An electric bulb rated $$50 \mathrm{~W}-200 \mathrm{~V}$$ is connected across a $$100 \mathrm{~V}$$ supply. The power dissipation of the bulb is:
JEE Main 2024 (Online) 4th April Evening Shift
44
To measure the internal resistance of a battery, potentiometer is used. For $$R=10 \Omega$$, the balance point is observed at $$l=500 \mathrm{~cm}$$ and for $$\mathrm{R}=1 \Omega$$ the balance point is observed at $$l=400 \mathrm{~cm}$$. The internal resistance of the battery is approximately :
JEE Main 2024 (Online) 4th April Morning Shift
45
In a metre-bridge when a resistance in the left gap is $2 \Omega$ and unknown resistance in the right gap, the balance length is found to be $40 \mathrm{~cm}$. On shunting the unknown resistance with $2 \Omega$, the balance length changes by :
JEE Main 2024 (Online) 1st February Evening Shift
46
In an ammeter, $5 \%$ of the main current passes through the galvanometer. If resistance of the galvanometer is $\mathrm{G}$, the resistance of ammeter will be :
JEE Main 2024 (Online) 1st February Evening Shift
47
JEE Main 2024 (Online) 1st February Morning Shift
48
A galvanometer has a resistance of $50 ~\Omega$ and it allows maximum current of $5 \mathrm{~mA}$. It can be converted into voltmeter to measure upto $100 \mathrm{~V}$ by connecting in series a resistor of resistance :
JEE Main 2024 (Online) 1st February Morning Shift
49
By what percentage will the illumination of the lamp decrease if the current drops by 20%?
JEE Main 2024 (Online) 31st January Evening Shift
50
The resistance per centimeter of a meter bridge wire is $$r$$, with $$X \Omega$$ resistance in left gap. Balancing length from left end is at $$40 \mathrm{~cm}$$ with $$25 \Omega$$ resistance in right gap. Now the wire is replaced by another wire of $$2 r$$ resistance per centimeter. The new balancing length for same settings will be at
JEE Main 2024 (Online) 31st January Evening Shift
51
Two conductors have the same resistances at $$0^{\circ} \mathrm{C}$$ but their temperature coefficients of resistance are $$\alpha_1$$ and $$\alpha_2$$. The respective temperature coefficients for their series and parallel combinations are :
JEE Main 2024 (Online) 31st January Morning Shift
52
When a potential difference $$V$$ is applied across a wire of resistance $$R$$, it dissipates energy at a rate $$W$$. If the wire is cut into two halves and these halves are connected mutually parallel across the same supply, the energy dissipation rate will become:
JEE Main 2024 (Online) 30th January Evening Shift
53
JEE Main 2024 (Online) 30th January Morning Shift
54
An electric toaster has resistance of $$60 \Omega$$ at room temperature $$\left(27^{\circ} \mathrm{C}\right)$$. The toaster is connected to a $$220 \mathrm{~V}$$ supply. If the current flowing through it reaches $$2.75 \mathrm{~A}$$, the temperature attained by toaster is around : ( if $$\alpha=2 \times 10^{-4}$$/$$^\circ \mathrm{C}$$)
JEE Main 2024 (Online) 30th January Morning Shift
55
JEE Main 2024 (Online) 29th January Evening Shift
56
The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of $$24 \Omega$$ is applied. The resistance of galvanometer coil will be :
JEE Main 2024 (Online) 29th January Morning Shift
57
A galvanometer having coil resistance $$10 \Omega$$ shows a full scale deflection for a current of $$3 \mathrm{~mA}$$. For it to measure a current of $$8 \mathrm{~A}$$, the value of the shunt should be:
JEE Main 2024 (Online) 29th January Morning Shift
58
The electric current through a wire varies with time as $$I=I_0+\beta t$$, where $$I_0=20 \mathrm{~A}$$ and $$\beta=3 \mathrm{~A} / \mathrm{s}$$. The amount of electric charge crossed through a section of the wire in $$20 \mathrm{~s}$$ is :
JEE Main 2024 (Online) 29th January Morning Shift
59
JEE Main 2024 (Online) 27th January Evening Shift
60
A current of $$200 \mu \mathrm{A}$$ deflects the coil of a moving coil galvanometer through $$60^{\circ}$$. The current to cause deflection through $$\frac{\pi}{10}$$ radian is :
JEE Main 2024 (Online) 27th January Evening Shift
61
Wheatstone bridge principle is used to measure the specific resistance $$\left(S_1\right)$$ of given wire, having length $$L$$, radius $$r$$. If $$X$$ is the resistance of wire, then specific resistance is ; $$S_1=X\left(\frac{\pi r^2}{L}\right)$$. If the length of the wire gets doubled then the value of specific resistance will be :
JEE Main 2024 (Online) 27th January Evening Shift
62
A wire of length $$10 \mathrm{~cm}$$ and radius $$\sqrt{7} \times 10^{-4} \mathrm{~m}$$ connected across the right gap of a meter bridge. When a resistance of $$4.5 \Omega$$ is connected on the left gap by using a resistance box, the balance length is found to be at $$60 \mathrm{~cm}$$ from the left end. If the resistivity of the wire is $$\mathrm{R} \times 10^{-7} \Omega \mathrm{m}$$, then value of $$\mathrm{R}$$ is :
JEE Main 2024 (Online) 27th January Morning Shift
63
A wire of resistance $$\mathrm{R}$$ and length $$\mathrm{L}$$ is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be :
JEE Main 2024 (Online) 27th January Morning Shift
64
JEE Main 2023 (Online) 15th April Morning Shift
65
JEE Main 2023 (Online) 15th April Morning Shift
66
JEE Main 2023 (Online) 13th April Morning Shift
67
A wire of resistance $$160 ~\Omega$$ is melted and drawn in a wire of one-fourth of its length. The new resistance of the wire will be
JEE Main 2023 (Online) 12th April Morning Shift
68
JEE Main 2023 (Online) 11th April Evening Shift
69
Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in same time for parallel to series will be:
JEE Main 2023 (Online) 11th April Morning Shift
70
The current sensitivity of moving coil galvanometer is increased by $$25 \%$$. This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be:
JEE Main 2023 (Online) 11th April Morning Shift
71
JEE Main 2023 (Online) 10th April Morning Shift
72
JEE Main 2023 (Online) 8th April Evening Shift
73
JEE Main 2023 (Online) 6th April Evening Shift
74
A student is provided with a variable voltage source $$\mathrm{V}$$, a test resistor $$R_{T}=10 ~\Omega$$, two identical galvanometers $$G_{1}$$ and $$G_{2}$$ and two additional resistors, $$R_{1}=10 ~M \Omega$$ and $$R_{2}=0.001 ~\Omega$$. For conducting an experiment to verify ohm's law, the most suitable circuit is:
JEE Main 2023 (Online) 6th April Evening Shift
75
JEE Main 2023 (Online) 1st February Evening Shift
76
Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be :
JEE Main 2023 (Online) 1st February Evening Shift
77
JEE Main 2023 (Online) 1st February Morning Shift
78
The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by $50 \%$. The percentage change in voltage sensitivity of the galvanometer will be :
JEE Main 2023 (Online) 31st January Evening Shift
79
The $\mathrm{H}$ amount of thermal energy is developed by a resistor in $10 \mathrm{~s}$ when a current of $4 \mathrm{~A}$ is passed through it. If the current is increased to $16 \mathrm{~A}$, the thermal energy developed by the resistor in $10 \mathrm{~s}$ will be :
JEE Main 2023 (Online) 31st January Evening Shift
80
The drift velocity of electrons for a conductor connected in an electrical circuit is $$\mathrm{V}_{\mathrm{d}}$$. The conductor in now replaced by another conductor with same material and same length but double the area of cross section. The applied voltage remains same. The new drift velocity of electrons will be
JEE Main 2023 (Online) 31st January Morning Shift
81
JEE Main 2023 (Online) 30th January Evening Shift
82
The charge flowing in a conductor changes with time as $$\mathrm{Q}(\mathrm{t})=\alpha \mathrm{t}-\beta \mathrm{t}^{2}+\gamma \mathrm{t}^{3}$$. Where $$\alpha, \beta$$ and $$\gamma$$ are constants. Minimum value of current is :
JEE Main 2023 (Online) 30th January Morning Shift
83
JEE Main 2023 (Online) 29th January Evening Shift
84
Ratio of thermal energy released in two resistors R and 3R connected in parallel in an electric circuit is :
JEE Main 2023 (Online) 29th January Morning Shift
85
The resistance of a wire is 5 $$\Omega$$. It's new resistance in ohm if stretched to 5 times of it's original length will be :
JEE Main 2023 (Online) 25th January Evening Shift
86
A uniform metallic wire carries a current 2 A, when 3.4 V battery is connected across it. The mass of uniform metallic wire is 8.92 $$\times$$ 10$$^{-3}$$ kg, density is 8.92 $$\times$$ 10$$^{3}$$ kg/m$$^3$$ and resistivity is 1.7 $$\times$$ 10$$^{-8}~\Omega$$-$$\mathrm{m}$$. The length of wire is :
JEE Main 2023 (Online) 25th January Morning Shift
87
A cell of emf 90 V is connected across series combination of two resistors each of 100$$\Omega$$ resistance. A voltmeter of resistance 400$$\Omega$$ is used to measure the potential difference across each resistor. The reading of the voltmeter will be :
JEE Main 2023 (Online) 24th January Evening Shift
88
JEE Main 2023 (Online) 24th January Morning Shift
89
JEE Main 2022 (Online) 29th July Evening Shift
90
A $$1 \mathrm{~m}$$ long wire is broken into two unequal parts $$\mathrm{X}$$ and $$\mathrm{Y}$$. The $$\mathrm{X}$$ part of the wire is streched into another wire W. Length of $$W$$ is twice the length of $$X$$ and the resistance of $$\mathrm{W}$$ is twice that of $$\mathrm{Y}$$. Find the ratio of length of $$\mathrm{X}$$ and $$\mathrm{Y}$$.
JEE Main 2022 (Online) 29th July Evening Shift
91
Two metallic wires of identical dimensions are connected in series. If $$\sigma_{1}$$ and $$\sigma_{2}$$ are the conductivities of the these wires respectively, the effective conductivity of the combination is :
JEE Main 2022 (Online) 29th July Morning Shift
92
JEE Main 2022 (Online) 28th July Evening Shift
93
A wire of resistance R
1
is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is :
JEE Main 2022 (Online) 28th July Morning Shift
94
JEE Main 2022 (Online) 27th July Evening Shift
95
Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The internal resistances of the two sources are $$r_{1}$$ and $$r_{2}$$ $$\left(r_{1}>r_{2}\right)$$. If the potential difference across the source of internal resistance $$r_{1}$$ is zero, then the value of R will be :
JEE Main 2022 (Online) 27th July Morning Shift
96
JEE Main 2022 (Online) 26th July Evening Shift
97
JEE Main 2022 (Online) 26th July Morning Shift
98
JEE Main 2022 (Online) 25th July Evening Shift
99
Which of the following physical quantities have the same dimensions?
JEE Main 2022 (Online) 25th July Morning Shift
100
An electric cable of copper has just one wire of radius 9 mm. Its resistance is 14 $$\Omega$$. If this single copper wire of the cable is replaced by seven identical well insulated copper wires each of radius 3 mm connected in parallel, then the new resistance of the combination will be :
JEE Main 2022 (Online) 30th June Morning Shift
101
The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of 2$$\Omega$$. The value of internal resistance of each cell is
JEE Main 2022 (Online) 29th June Evening Shift
102
Resistance of the wire is measured as 2 $$\Omega$$ and 3 $$\Omega$$ at 10$$^\circ$$C and 30$$^\circ$$C respectively. Temperature co-efficient of resistance of the material of the wire is :
JEE Main 2022 (Online) 28th June Evening Shift
103
A 72 $$\Omega$$ galvanometer is shunted by a resistance of 8 $$\Omega$$. The percentage of the total current which passes through the galvanometer is :
JEE Main 2022 (Online) 27th June Morning Shift
104
JEE Main 2022 (Online) 26th June Evening Shift
105
An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is :
JEE Main 2022 (Online) 26th June Morning Shift
106
Two cells of same emf but different internal resistances r
1
and r
2
are connected in series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, is :
JEE Main 2022 (Online) 25th June Evening Shift
107
If n represents the actual number of deflections in a converted galvanometer of resistance G and shunt resistance S. Then the total current I when its figure of merit is K will be:
JEE Main 2022 (Online) 25th June Evening Shift
108
A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for $${1 \over 3}$$ deflection in the galvanometer. Which of the below is true for measuring value of G?
JEE Main 2022 (Online) 25th June Morning Shift
109
What will be the most suitable combination of three resistors A = 2$$\Omega$$, B = 4$$\Omega$$, C = 6$$\Omega$$ so that $$\left( {{{22} \over 3}} \right)$$$$\Omega$$ is equivalent resistance of combination?
JEE Main 2022 (Online) 24th June Evening Shift
110
Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each of resistance 20 $$\Omega$$. A voltmeter connected in the circuit measures 1.2 V. The internal resistance of each cell is :
JEE Main 2022 (Online) 24th June Morning Shift
111
Due to cold weather a 1 m water pipe of cross-sectional area 1 cm
2
is filled with ice at $$-$$10$$^\circ$$C. Resistive heating is used to melt the ice. Current of 0.5A is passed through 4 k$$\Omega$$ resistance. Assuming that all the heat produced is used for melting, what is the minimum time required? (Given latent heat of fusion for water/ice = 3.33 $$\times$$ 10
5
J kg
$$-$$1
, specific heat of ice = 2 $$\times$$ 10
3
J kg
$$-$$1
and density of ice = 10
3
kg/m
3
JEE Main 2021 (Online) 1st September Evening Shift
112
Two resistors R
1
= (4 $$\pm$$ 0.8) $$\Omega$$ and R
2
= (4 $$\pm$$ 0.4) $$\Omega$$ are connected in parallel. The equivalent resistance of their parallel combination will be :
JEE Main 2021 (Online) 1st September Evening Shift
113
JEE Main 2021 (Online) 31st August Evening Shift
114
Consider a galvanometer shunted with 5$$\Omega$$ resistance and 2% of current passes through it. What is the resistance of the given galvanometer ?
JEE Main 2021 (Online) 31st August Morning Shift
115
JEE Main 2021 (Online) 27th August Evening Shift
116
For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanometer if its current sensitivity is 2 div/mA will be :
JEE Main 2021 (Online) 27th August Evening Shift
117
Five identical cells each of internal resistance 1$$\Omega$$ and emf 5V are connected in series and in parallel with an external resistance 'R'. For what value of 'R', current in series and parallel combination will remain the same?
JEE Main 2021 (Online) 27th August Morning Shift
118
If you are provided a set of resistances 2$$\Omega$$, 4$$\Omega$$, 6$$\Omega$$ and 8$$\Omega$$. Connect these resistances so as to obtain an equivalent resistance of $${{46} \over 3}$$$$\Omega$$.
JEE Main 2021 (Online) 26th August Evening Shift
119
An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W.
JEE Main 2021 (Online) 26th August Evening Shift
120
In the given figure, the emf of the cell is 2.2 V and if internal resistance is 0.6$$\Omega$$. Calculate the power dissipated in the whole circuit :
JEE Main 2021 (Online) 26th August Morning Shift
121
JEE Main 2021 (Online) 26th August Morning Shift
122
The resistance of a conductor at 15$$^\circ$$C is 16$$\Omega$$ and at 100$$^\circ$$C is 20$$\Omega$$. What will be the temperature coefficient of resistance of the conductor?
JEE Main 2021 (Online) 27th July Evening Shift
123
JEE Main 2021 (Online) 27th July Morning Shift
124
JEE Main 2021 (Online) 25th July Evening Shift
125
JEE Main 2021 (Online) 25th July Evening Shift
126
JEE Main 2021 (Online) 25th July Morning Shift
127
JEE Main 2021 (Online) 22th July Evening Shift
128
JEE Main 2021 (Online) 20th July Morning Shift
129
The value of current in the 6 $$\Omega$$ resistance is :
JEE Main 2021 (Online) 20th July Morning Shift
130
In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 cm and diameter of 5.00 mm. The measured current in the conductor is 2.00 A. The maximum permissible percentage error in the resistivity of the conductor is :
JEE Main 2021 (Online) 18th March Morning Shift
131
JEE Main 2021 (Online) 17th March Evening Shift
132
JEE Main 2021 (Online) 17th March Evening Shift
133
A current of 10A exists in a wire of cross-sectional area of 5 mm
2
with a drift velocity of 2 $$\times$$ 10
$$-$$3
ms
$$-$$1
. The number of free electrons in each cubic meter of the wire is ___________.
JEE Main 2021 (Online) 17th March Morning Shift
134
A resistor develops 500 J of thermal energy in 20 s when a current of 1.5A is passed through it. If the current is increased from 1.5A to 3A, what will be the energy developed in 20 s.
JEE Main 2021 (Online) 16th March Evening Shift
135
JEE Main 2021 (Online) 16th March Morning Shift
136
A wire of 1$$\Omega$$ has a length of 1 m. It is stretched till its length increases by 25%. The percentage change in resistance to the nearest integer is :
JEE Main 2021 (Online) 26th February Evening Shift
137
JEE Main 2021 (Online) 26th February Morning Shift
138
JEE Main 2021 (Online) 24th February Morning Shift
139
JEE Main 2021 (Online) 24th February Morning Shift
140
A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly
to the resistor. In the circuit :
JEE Main 2020 (Online) 6th September Evening Slot
141
JEE Main 2020 (Online) 6th September Evening Slot
142
In the circuit, given in the figure currents in
different branches and value of one resistor are
shown. Then potential at point B with respect to
the point A is :
JEE Main 2020 (Online) 5th September Evening Slot
143
A galvanometer is used in laboratory for
detecting the null point in electrical
experiments. If, on passing a current of 6 mA it
produces a deflection of 2
o
, its figure of merit
is close to :
JEE Main 2020 (Online) 5th September Evening Slot
144
An electrical power line, having a total
resistance of 2 $$\Omega $$, delivers 1 kW at 220 V. The
efficiency of the transmission line is
approximately :
JEE Main 2020 (Online) 5th September Morning Slot
145
A galvanometer of resistance G is converted
into a voltmeter of range 0 – 1 V by connecting
a resistance R
1
in series with it. The additional
resistance that should be connected in series
with R
1
to increase the range of the voltmeter
to 0 – 2 V will be :
JEE Main 2020 (Online) 5th September Morning Slot
146
The value of current i
1
flowing from A to C in the circuit diagram is :
JEE Main 2020 (Online) 4th September Evening Slot
147
A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is :
JEE Main 2020 (Online) 4th September Morning Slot
148
Two resistors 400$$\Omega $$ and 800$$\Omega $$ are connected in series across a 6 V battery. The potential difference measured by a voltmeter of 10 k$$\Omega $$ across 400 $$\Omega $$ resistor is close to :
JEE Main 2020 (Online) 3rd September Evening Slot
149
Model a torch battery of length $$l$$ to be made up
of a thin cylindrical bar of radius ‘a’ and a
concentric thin cylindrical shell of radius ‘b’
filled in between with an electrolyte of
resistivity $$\rho $$ (see figure). If the battery is
connected to a resistance of value R, the
maximum Joule heating in R will take place for :
JEE Main 2020 (Online) 3rd September Morning Slot
150
A potentiometer wire PQ of 1 m length is
connected to a standard cell E
1
. Another cell E
2
of emf 1.02 V is connected with a resistance ‘r’
and switch S (as shown in figure). With switch
S open, the null position is obtained at a
distance of 49 cm from Q. The potential
gradient in the potentiometer wire is :
JEE Main 2020 (Online) 2nd September Evening Slot
151
Consider four conducting materials copper,
tungsten, mercury and aluminium with
resistivity $$\rho $$
C
, $$\rho $$
T
, $$\rho $$
M
and $$\rho $$
A
respectively. Then :
JEE Main 2020 (Online) 2nd September Morning Slot
152
In the given circuit diagram, a wire is joining
points B and D. The current in this wire is :
JEE Main 2020 (Online) 9th January Morning Slot
153
A galvanometer having a coil resistance
100 $$\Omega $$ gives a full scale deflection when a
current of 1 mA is passed through it. What is
the value of the resistance which can convert
this galvanometer into a voltmeter giving full
scale deflection for a potential difference of
10 V?
JEE Main 2020 (Online) 8th January Evening Slot
154
The length of a potentiometer wire is 1200 cm
and it carries a current of 60 mA. For a cell of
emf 5V and internal resistance of 20$$\Omega $$, the null
point on it is found to be a 1000 cm. The
resistance of whole wire is :
JEE Main 2020 (Online) 8th January Morning Slot
155
In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10 W and 2 heaters
of 1 kW. The voltage of electric main is 220 V. The minimum fuse capacity (rated value) of the
building will be :
JEE Main 2020 (Online) 7th January Evening Slot
156
The current I
1
(in A) flowing through 1 $$\Omega $$ resistor in the following circuit is :
JEE Main 2020 (Online) 7th January Morning Slot
157
A moving coil galvanometer, having a resistance G, produces full scale deflection when a current Ig flows
through it. This galvanometer can be converted into (i) an ammeter of range 0 to I
0
(I
0
> I
g
) by connecting a
shunt resistance R
A
to it and (ii) into a voltmeter of range 0 to V (V = GI
0
) by connecting a series resistance
R
V
to it. Then,
JEE Main 2019 (Online) 12th April Evening Slot
158
The resistive network shown below is connected to a D.C. source of 16 V. The power consumed by the
network is 4 Watt. The value of R is:
JEE Main 2019 (Online) 12th April Morning Slot
159
A galvanometer of resistance 100 $$\Omega $$ has 50 divisions on its scale and has sensitivitv of 20 $$\mu $$A/division. It is
to be converted to a voltmeter with three ranges of 0-2V, 0-10 V and 0-20 V. The appropriate circuit to do so
is
JEE Main 2019 (Online) 12th April Morning Slot
160
To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. The
measured voltage is plotted as a function of the current, and the following graph is obtained :
If V
0
is almost zero, identify the correct statement :
JEE Main 2019 (Online) 12th April Morning Slot
161
Space between two concentric conducting spheres of radii a and b (b > a) is filled with a medium of
resistivity $$\rho $$. The resistance between the two spheres will be :
JEE Main 2019 (Online) 10th April Evening Slot
162
A current of 5 A passes through a copper
conductor (resistivity = 1.7 × 10
–8
$$\Omega $$m) of radius
of cross-section 5 mm. Find the mobility of the
charges if their drift velocity is 1.1 × 10
–3
m/s.
JEE Main 2019 (Online) 10th April Morning Slot
163
In a meter bridge experiment, the circuit
diagram and the corresponding observation
table are shown in figure
SI. No.
R($$\Omega $$)
l(cm)
1.
1000
60
2.
100
13
3.
10
1.5
4.
1
1.0
Which of the readings is inconsistent?
JEE Main 2019 (Online) 10th April Morning Slot
164
In an experiment, the resistance of a material
is plotted as a function of temperature (in some
range). As shown in the figure, it is a straight
line. One may conclude that :
JEE Main 2019 (Online) 10th April Morning Slot
165
A moving coil galvanometer allows a full scale
current of 10
–4
A. A series resistance of 2 M$$\Omega $$
is required to convert the above galvanometer
into a voltmeter of range 0-5 V. Therefore the
value of shunt resistance required to convert the
above galvanometer into an ammeter of range
0.10 mA is :
JEE Main 2019 (Online) 10th April Morning Slot
166
In the given circuit, an ideal voltmeter
connected across the 10$$\Omega $$ resistance reads 2V.
The internal resistance r, of each cell is:
JEE Main 2019 (Online) 10th April Morning Slot
167
A metal wire of resistance 3 $$\Omega $$ is elongated to
make a uniform wire of double its previous
length. This new wire is now bent and the ends
joined to make a circle. If two points on this
circle make an angle 60° at the centre, the
equivalent resistance between these two points
will be :-
JEE Main 2019 (Online) 9th April Evening Slot
168
The resistance of a galvanometer is 50 ohm and
the maximum current which can be passed
through it is 0.002 A. What resistance must be
connected to it in order to convert it into an
ammeter of range 0 – 0.5 A ?
JEE Main 2019 (Online) 9th April Evening Slot
169
In a conductor, if the number of conduction
electrons per unit volume is 8.5 × 10
28
m
–3
and
mean free time is 25ƒs (femto second), it's
approximate resistivity is :-
(m
e
= 9.1 × 10
–31
kg)
JEE Main 2019 (Online) 9th April Evening Slot
170
A wire of resistance R is bent to form a square
ABCD as shown in the figure. The effective
resistance between E and C is :
(E is mid-point of arm CD)
JEE Main 2019 (Online) 9th April Morning Slot
171
A moving coil galvanometer has resistance 50$$\Omega $$
and it indicates full deflection at 4mA current.
A voltmeter is made using this galvanometer
and a 5 k$$\Omega $$ resistance. The maximum voltage,
that can be measured using this voltmeter, will
be close to :
JEE Main 2019 (Online) 9th April Morning Slot
172
In the circuit shown, a four-wire potentiometer
is made of a 400 cm long wire, which extends
between A and B. The resistance per unit length
of the potentiometer wire is r = 0.01 $$\Omega $$/cm. If
an ideal voltmeter is connected as shown with
jockey J at 50 cm from end A, the expected
reading of the voltmeter will be :-
JEE Main 2019 (Online) 8th April Evening Slot
173
A cell of internal resistance r drives current
through an external resistance R. The power
delivered by the cell to the external resistance
will be maximum when :-
JEE Main 2019 (Online) 8th April Evening Slot
174
In the figure shown, what is the current
(in Ampere) drawn from the battery ?
You are
given:
R
1
= 15$$\Omega $$, R
2
= 10 $$\Omega $$, R
3
= 20 $$\Omega $$, R
4
= 5$$\Omega $$,
R
5
= 25$$\Omega $$, R
6
= 30 $$\Omega $$, E = 15 V
JEE Main 2019 (Online) 8th April Evening Slot
175
A 200 $$\Omega $$ resistor has a certain color code. If one
replaces the red color by green in the code, the
new resistance will be :
JEE Main 2019 (Online) 8th April Morning Slot
176
For the circuit shown, with R
1
= 1.0W, R
2
= 2.0 W,
E
1
= 2 V and E
2
= E
3
= 4 V, the potential
difference between the points 'a' and 'b' is
approximately (in V):
JEE Main 2019 (Online) 8th April Morning Slot
177
JEE Main 2019 (Online) 12th January Evening Slot
178
A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 $$ \times $$ 10
–4
A passes through it, its needle ( pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of :
JEE Main 2019 (Online) 12th January Evening Slot
179
JEE Main 2019 (Online) 12th January Morning Slot
180
Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs draw powers P
1
and P
2
respectively, then :
JEE Main 2019 (Online) 12th January Morning Slot
181
JEE Main 2019 (Online) 12th January Morning Slot
182
An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m and esistance 5 $$\Omega $$. The value of R, to give a potential difference of 5 mV across 10 cm of potentiometer wire, is :
JEE Main 2019 (Online) 12th January Morning Slot
183
A galvanometer having a resistance of 20 $$\Omega $$ and 30 divisions on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter upto 15 volt, is:
JEE Main 2019 (Online) 11th January Evening Slot
184
JEE Main 2019 (Online) 11th January Evening Slot
185
JEE Main 2019 (Online) 11th January Evening Slot
186
Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be :
JEE Main 2019 (Online) 11th January Morning Slot
187
JEE Main 2019 (Online) 11th January Morning Slot
188
JEE Main 2019 (Online) 11th January Morning Slot
189
A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is -
JEE Main 2019 (Online) 10th January Evening Slot
190
JEE Main 2019 (Online) 10th January Evening Slot
191
JEE Main 2019 (Online) 10th January Evening Slot
192
A uniform metallic wire has a resistance of 18 $$\Omega $$ and is bent into an equilateral triangle. Then, the resistance between any two vertices of the triangle is -
JEE Main 2019 (Online) 10th January Morning Slot
193
A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be passed through this resistor is -
JEE Main 2019 (Online) 10th January Morning Slot
194
JEE Main 2019 (Online) 10th January Morning Slot
195
JEE Main 2019 (Online) 10th January Morning Slot
196
JEE Main 2019 (Online) 9th January Evening Slot
197
JEE Main 2019 (Online) 9th January Evening Slot
198
JEE Main 2019 (Online) 9th January Morning Slot
199
JEE Main 2019 (Online) 9th January Morning Slot
200
Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm
2
, is $$\upsilon $$. If the electron density in copper is 9 $$ \times $$ 10
28
/m
3
the value of $$\upsilon $$. in mm/s is close to (Take charge of electron to be = 1.6 $$ \times $$ 10
$$-$$19
C)
JEE Main 2019 (Online) 9th January Morning Slot
201
A galvanometer with its coil resistance 25 $$\Omega $$ requires a current of 1 mA for its full deflection. In order to construct an ammeter to read upto a current of 2 A, the approximate value of the shunt resistance should be :
JEE Main 2018 (Online) 16th April Morning Slot
202
A heating element has a resistance of 100 $$\Omega $$ at room temperature. When it is connected to a supply of 220 V, a steady current of 2 A passes in it and temperature is 500
o
C more than room temperature. what is the temperature coefficient of resistance of the heating element ?
JEE Main 2018 (Online) 16th April Morning Slot
203
In a circuit for finding the resistance of a galvanometer by half deflection method, a 6 V battery and a high resistance of 11 k$$\Omega $$ are used. The figure of merit of the galvanometer is 60 $$\mu A/$$division. In the absence of shunt resistance, the galvanometer produces a deflection of $$\theta $$ = 9 divisions when current flows in the circuit. The value of the shunt resistance that can cause the deflection of $$\theta /2,$$ is closest to :
JEE Main 2018 (Online) 16th April Morning Slot
204
On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The
resistance of their series combination is 1 k$$\Omega $$. How much was the resistance on the left slot before
interchanging the resistances?
JEE Main 2018 (Offline)
205
Two batteries with e.m.f 12 V and 13 V are connected in parallel across a load resistor of 10 $$\Omega $$. The
internal resistances of the two batteries are 1 $$\Omega $$ and 2 $$\Omega $$ respectively. The voltage across the load lies between :
JEE Main 2018 (Offline)
206
In a potentiometer experiment, it is found that no current passes through the galvanometer when the
terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by a
resistance of 5 $$\Omega$$, a balance is found when the cell is connected across 40 cm of the wire. Find the internal
resistance of the cell.
JEE Main 2018 (Offline)
207
A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge density of the rod is $$\rho $$, how long will the changes take to travel a distance d ?
JEE Main 2018 (Online) 15th April Evening Slot
208
A constant voltages is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be :
JEE Main 2018 (Online) 15th April Evening Slot
209
In a meter bridge, as shown in the figure, it is given that resistance $$Y = 12.5\,\,\Omega $$ and that the balance is obtained at a distance $$39.5$$ $$cm$$ from end $$A$$ (by Jockey J). After interchanging the resistances $$X$$ and $$Y$$, a new balance point is found at a distance $${l_2}$$ from end $$A.$$ What are the value of $$X$$ and $${l_2}$$ ?
JEE Main 2018 (Online) 15th April Morning Slot
210
JEE Main 2018 (Online) 15th April Morning Slot
211
JEE Main 2017 (Online) 9th April Morning Slot
212
JEE Main 2017 (Online) 9th April Morning Slot
213
A uniform wire of length 1 and radius r has a resistance of 100 $$\Omega $$. It is recast into a wire of radius $${r \over 2}.$$ The resistance of new wire will be :
JEE Main 2017 (Online) 9th April Morning Slot
214
A 9 V battery with internal resistance of 0.5 $$\Omega $$ is connected across an infinite network as shown in the figure. All ammeters A
1
, A
2
,
3
and voltmeter V are ideal.
Choose correct statement.
JEE Main 2017 (Online) 8th April Morning Slot
215
JEE Main 2017 (Online) 8th April Morning Slot
216
Which of the following statements is
false
?
JEE Main 2017 (Offline)
217
In the given circuit, the current in each resistance is:
JEE Main 2017 (Offline)
218
When a current of 5 mA is passed through a galvanometer having a coil of resistance 15$$\Omega $$, it shows full
scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a
voltmeter of range 0 – 10V is:
JEE Main 2017 (Offline)
219
JEE Main 2016 (Online) 10th April Morning Slot
220
The resistance of an electrical toaster has a temperature dependence given by R(T) = R
0
[1 + $$\alpha $$(T − T
0
)] in its range of operation. At T
0
= 300 K, R = 100 $$\Omega $$ and at T = 500 K, R = 120 $$\Omega $$. The toaster is connected to a voltage source at 200 V and its temperature is raised at a constant rate
from 300 to 500 K in 30 s. The total work done in raising the temperature is :
JEE Main 2016 (Online) 10th April Morning Slot
221
In the circuit shown, the resistance r is a variable resistance. If for r =
fR,
the heat generation in r is maximum then the value of
f
is :
JEE Main 2016 (Online) 9th April Morning Slot
222
A 50 $$\Omega $$ resistance is connected to a battery of 5 V. A galvanometer of resistance 100 $$\Omega $$ is to be used as an ammeter to measure current through the resistance, for this a resistance r
s
is connected to the galvanometer. Which of the following connections should be employed if the measured current is within 1% of thecurrent without the ammeter in the circuit ?
JEE Main 2016 (Online) 9th April Morning Slot
223
A galvanometer having a coil resistance of $$100\,\Omega $$ gives a full scale deflection, when a currect of $$1$$ $$mA$$ is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of $$10$$ $$A,$$ is :
JEE Main 2016 (Offline)
224
In the circuit shown, the current in the $$1\Omega $$ resistor is :
JEE Main 2015 (Offline)
225
When $$5V$$ potential difference is applied across a wire of length $$0.1$$ $$m,$$ the drift speed of electrons is $$2.5 \times {10^{ - 4}}\,\,m{s^{ - 1}}.$$ If the electron density in the wire is $$8 \times {10^{28}}\,\,{m^{ - 3}},$$ the resistivity of the material is close to :
JEE Main 2015 (Offline)
226
In a large building, three are $$15$$ bulbs of $$40$$ $$W$$, $$5$$ bulbs of $$100$$ $$W$$, $$5$$ fans of $$80$$ $$W$$ and $$1$$ heater of $$1$$ $$kW.$$ The voltage of electric mains is $$220$$ $$V.$$ The minimum capacity of the main fuse of the building will be:
JEE Main 2014 (Offline)
227
The supply voltage to room is $$120V.$$ The resistance of the lead wires is $$6\Omega $$. A $$60$$ $$W$$ bulb is already switched on. What is the decrease of voltage across the bulb, when a $$240$$ $$W$$ heater is switched on in parallel to the bulb?
JEE Main 2013 (Offline)
228
JEE Main 2013 (Offline)
229
Two electric bulbs marked $$25W$$ $$-$$ $$220$$ $$V$$ and $$100W$$ $$-$$ $$220V$$ are connected in series to a $$440$$ $$V$$ supply. Which of the bulbs will fuse?
AIEEE 2012
230
If a wire is stretched to make it $$0.1\% $$ longer, its resistance will:
AIEEE 2011
231
Two conductors have the same resistance at $${0^ \circ }C$$ but their temperature coefficients of resistance are $${\alpha _1}$$ and $${\alpha _2}.$$ The respective temperature coefficients of their series and parallel combinations are nearly
AIEEE 2010
232
AIEEE 2008
233
AIEEE 2008
234
AIEEE 2008
235
AIEEE 2008
236
The resistance of a wire is $$5$$ ohm at $${50^ \circ }C$$ and $$6$$ ohm at $${100^ \circ }C.$$ The resistance of the wire at $${0^ \circ }C$$ will be
AIEEE 2007
237
A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will
AIEEE 2006
238
An electric bulb is rated $$220$$ volt - $$100$$ watt. The power consumed by it when operated on $$110$$ volt will be
AIEEE 2006
239
In a Wheatstone's bridge, three resistance $$P, Q$$ and $$R$$ connected in the three arms and the fourth arm is formed by two resistances $${S_1}$$ and $${S_2}$$ connected in parallel. The condition for the bridge to be balanced will be
AIEEE 2006
240
The resistance of bulb filmanet is $$100\Omega $$ at a temperature of $${100^ \circ }C.$$ If its temperature coefficient of resistance be $$0.005$$ per $$^ \circ C$$, its resistance will become $$200\,\Omega $$ at a temperature of
AIEEE 2006
241
The current $${\rm I}$$ drawn from the $$5$$ volt source will be
AIEEE 2006
242
Two sources of equal $$emf$$ are connected to an external resistance $$R.$$ The internal resistance of the two sources are $${R_1}$$ and $${R_2}\left( {{R_1} > {R_1}} \right).$$ If the potential difference across the source having internal resistance $${R_2}$$ is zero, then
AIEEE 2005
243
An energy source will supply a constant current into the load if its internal resistance is
AIEEE 2005
244
In a potentiometer experiment the balancing with a cell is at length $$240$$ $$cm.$$ On shunting the cell with a resistance of $$2\Omega ,$$ the balancing length becomes $$120$$ $$cm$$. The internal resistance of the cell is
AIEEE 2005
245
The resistance of hot tungsten filament is about $$10$$ times the cold resistance. What will be resistance of $$100$$ $$W$$ and $$200$$ $$V$$ lamp when not in use ?
AIEEE 2005
246
A moving coil galvanometer has $$150$$ equal divisions. Its current sensitivity is $$10$$- divisions per milliampere and voltage sensitivity is $$2$$ divisions per millivolt. In order that each division reads $$1$$ volt, the resistance in $$ohms$$ needed to be connected in series with the coil will be -
AIEEE 2005
247
Two voltmeters, one of copper and another of silver, are joined in parallel. When a total charge $$q$$ flows through the voltmeters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are $${Z_1}$$ and $${Z_2}$$ respectively the charge which flows through the silver voltmeter is
AIEEE 2005
248
In the circuit, the galvanometer $$G$$ shows zero deflection. If the batteries $$A$$ and $$B$$ have negligible internal resistance, the value of the resistor $$R$$ will be -
AIEEE 2005
249
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
AIEEE 2005
250
The resistance of the series combination of two resistances is $$S.$$ When they are jointed in parallel the total resistance is $$P.$$ If $$S = nP$$ then the Minimum possible value of $$n$$ is
AIEEE 2004
251
An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii are in the ratio of $${4 \over 3}$$ and $${2 \over 3}$$, then the ratio of the current passing through the wires will be
AIEEE 2004
252
The total current supplied to the circuit by the battery is
AIEEE 2004
253
In a meter bridge experiment null point is obtained at $$20$$ $$cm$$, from one end of the wire when resistance $$X$$ is balanced against another resistance $$Y.$$ If $$X < Y$$, then where will be the new position of the null point from the same end, if one decides to balance a resistance of $$4$$ $$X$$ against $$Y$$
AIEEE 2004
254
Thermistors are usually made of
AIEEE 2004
255
The electrochemical equivalent of a metal is $${3.35109^{ - 7}}$$ $$kg$$ per Coulomb. The mass of the metal liberated at the cathode when a $$3A$$ current is passed for $$2$$ seconds will be
AIEEE 2004
256
The thermo $$emf$$ of a thermocouple varies with temperature $$\theta $$ of the hot junction as $$E = a\theta + b{\theta ^2}$$ in volts where the ratio $$a/b$$ is $${700^ \circ }C.$$ If the cold junction is kept at $${0^ \circ }C,$$ then the neutral temperature is
AIEEE 2004
257
A material $$'B'$$ has twice the specific resistance of $$'A'.$$ A circular wire made of $$'B'$$ has twice the diameter of a wire made of $$'A'$$. Then for the two wires to have the same resistance, the ratio $${l \over B}/{l \over A}$$ of their respective lengths must be
AIEEE 2004
258
The Kirchhoff's first law $$\left( {\sum i = 0} \right)$$ and second law $$\left( {\sum iR = \sum E} \right),$$ where the symbols have their usual meanings, are respectively based on
AIEEE 2004
259
The length of a given cylindrical wire is increased by $$100\% $$. Due to the consequent decrease in diameter the change in the resistance of the wire will be
AIEEE 2003
260
A $$220$$ volt, $$1000$$ watt bulb is connected across a $$110$$ $$volt$$ mains supply. The power consumed will be
AIEEE 2003
261
A $$3$$ volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current $${\rm I}$$, in the circuit will be
AIEEE 2003
262
The nagative $$Zn$$ pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by $$0.13g$$ in $$30$$ minutes. If the electrochemical equivalent of $$Zn$$ and $$Cu$$ are $$32.5$$ and $$31.5$$ respectively, the increase in the mass of the positive $$Cu$$ pole in this time is
AIEEE 2003
263
The thermo $$e.m.f.$$ of a thermo -couple is $$25$$ $$\mu V/{}^ \circ C$$ at room temperature. A galvanometer of $$40$$ $$ohm$$ resistance, capable of detecting current as low as $${10^{ - 5}}\,A,$$ is connected with the thermo couple. The smallest temperature difference that can be detected by this system is
AIEEE 2003
264
AIEEE 2003
265
An ammeter reads upto $$1$$ ampere. Its internal resistance is $$0.81$$ $$ohm$$. To increase the range to $$10$$ $$A$$ the value of the required shunt is
AIEEE 2003
266
If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a
AIEEE 2002
267
A wire when connected to $$220$$ $$V$$ mains supply has power dissipation $${P_1}.$$ Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is $${P_2}.$$ Then $${P_2}:{P_1}$$ is
AIEEE 2002
268
If $${\theta _1},$$ is the inversion temperature, $${\theta _n}$$ is the neutral temperature, $${\theta _c}$$ is the temperature of the cold junction, then
AIEEE 2002
269
The mass of product liberated on anode in an electrochemical cell depends on (where $$t$$ is the time period for which the current is passed).
AIEEE 2002
270
If in the circuit, power dissipation is $$150W,$$ then $$R$$ is
AIEEE 2002
Numerical
1
JEE Main 2026 (Online) 28th January Morning Shift
2
JEE Main 2026 (Online) 24th January Evening Shift
3
JEE Main 2026 (Online) 22nd January Evening Shift
4
JEE Main 2026 (Online) 21st January Morning Shift
5
Two cells of emfs 1 V and 2 V and internal resistances $2 \Omega$ and $1 \Omega$, respectively, are connected in series with an external resistance of $6 \Omega$. The total current in the circuit is $I_1$. Now the same two cells in parallel configuration are connected to same external resistance. In this case, the total current drawn is $\mathrm{I}_2$. The value of $\left(\frac{\mathrm{I}_1}{\mathrm{I}_2}\right)$ is $\frac{x}{3}$. The value of $x$ is___________.
JEE Main 2025 (Online) 3rd April Evening Shift
6
JEE Main 2025 (Online) 3rd April Morning Shift
7
JEE Main 2025 (Online) 28th January Evening Shift
8
A wire of resistance $9 \Omega$ is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be _________ ohm.
JEE Main 2025 (Online) 24th January Morning Shift
9
JEE Main 2025 (Online) 22nd January Evening Shift
10
JEE Main 2024 (Online) 9th April Evening Shift
11
At room temperature $$(27^{\circ} \mathrm{C})$$, the resistance of a heating element is $$50 \Omega$$. The temperature coefficient of the material is $$2.4 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}$$. The temperature of the element, when its resistance is $$62 \Omega$$, is __________$${ }^{\circ} \mathrm{C}$$.
JEE Main 2024 (Online) 9th April Evening Shift
12
JEE Main 2024 (Online) 9th April Morning Shift
13
JEE Main 2024 (Online) 8th April Evening Shift
14
Resistance of a wire at $$0^{\circ} \mathrm{C}, 100^{\circ} \mathrm{C}$$ and $$t^{\circ} \mathrm{C}$$ is found to be $$10 \Omega, 10.2 \Omega$$ and $$10.95 \Omega$$ respectively. The temperature $$t$$ in Kelvin scale is _________.
JEE Main 2024 (Online) 8th April Morning Shift
15
JEE Main 2024 (Online) 6th April Evening Shift
16
A wire of resistance $$R$$ and radius $$r$$ is stretched till its radius became $$r / 2$$. If new resistance of the stretched wire is $$x ~R$$, then value of $$x$$ is ________.
JEE Main 2024 (Online) 6th April Morning Shift
17
A wire of resistance $$20 \Omega$$ is divided into 10 equal parts, resulting pairs. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is _________ $$\Omega$$.
JEE Main 2024 (Online) 5th April Evening Shift
18
JEE Main 2024 (Online) 5th April Morning Shift
19
Two wires $$A$$ and $$B$$ are made up of the same material and have the same mass. Wire $$A$$ has radius of $$2.0 \mathrm{~mm}$$ and wire $$B$$ has radius of $$4.0 \mathrm{~mm}$$. The resistance of wire $$B$$ is $$2 \Omega$$. The resistance of wire $$A$$ is ________ $$\Omega$$.
JEE Main 2024 (Online) 4th April Evening Shift
20
JEE Main 2024 (Online) 4th April Morning Shift
21
The current in a conductor is expressed as $I=3 t^2+4 t^3$, where $I$ is in Ampere and $t$ is in second. The amount of electric charge that flows through a section of the conductor during $t=1 \mathrm{~s}$ to $t=2 \mathrm{~s}$ is __________ C.
JEE Main 2024 (Online) 1st February Morning Shift
22
JEE Main 2024 (Online) 31st January Evening Shift
23
JEE Main 2024 (Online) 31st January Morning Shift
24
Two resistance of $$100 \Omega$$ and $$200 \Omega$$ are connected in series with a battery of $$4 \mathrm{~V}$$ and negligible internal resistance. A voltmeter is used to measure voltage across $$100 \Omega$$ resistance, which gives reading as $$1 \mathrm{~V}$$. The resistance of voltmeter must be _______ $$\Omega$$.
JEE Main 2024 (Online) 30th January Evening Shift
25
JEE Main 2024 (Online) 30th January Morning Shift
26
JEE Main 2024 (Online) 29th January Evening Shift
27
JEE Main 2023 (Online) 15th April Morning Shift
28
When a resistance of $$5 ~\Omega$$ is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of $$250 \mathrm{~mA}$$, however when $$1050 ~\Omega$$ resistance is connected with it in series, it gives full scale deflection for 25 volt. The resistance of galvanometer is ____________ $$\Omega$$.
JEE Main 2023 (Online) 13th April Morning Shift
29
A potential $$\mathrm{V}_{0}$$ is applied across a uniform wire of resistance $$R$$. The power dissipation is $$P_{1}$$. The wire is then cut into two equal halves and a potential of $$V_{0}$$ is applied across the length of each half. The total power dissipation across two wires is $$P_{2}$$. The ratio $$P_{2}: \mathrm{P}_{1}$$ is $$\sqrt{x}: 1$$. The value of $$x$$ is ___________.
JEE Main 2023 (Online) 13th April Morning Shift
30
The current flowing through a conductor connected across a source is $$2 \mathrm{~A}$$ and 1.2 $$\mathrm{A}$$ at $$0^{\circ} \mathrm{C}$$ and $$100^{\circ} \mathrm{C}$$ respectively. The current flowing through the conductor at $$50^{\circ} \mathrm{C}$$ will be ___________ $$\times 10^{2} \mathrm{~mA}$$.
JEE Main 2023 (Online) 12th April Morning Shift
31
Two identical cells each of emf $$1.5 \mathrm{~V}$$ are connected in series across a $$10 ~\Omega$$ resistance. An ideal voltmeter connected across $$10 ~\Omega$$ resistance reads $$1.5 \mathrm{~V}$$. The internal resistance of each cell is __________ $$\Omega$$.
JEE Main 2023 (Online) 11th April Evening Shift
32
JEE Main 2023 (Online) 11th April Morning Shift
33
A rectangular parallelopiped is measured as $$1 \mathrm{~cm} \times 1 \mathrm{~cm} \times 100 \mathrm{~cm}$$. If its specific resistance is $$3 \times 10^{-7} ~\Omega \mathrm{m}$$, then the resistance between its two opposite rectangular faces will be ___________ $$\times 10^{-7} ~\Omega$$.
JEE Main 2023 (Online) 10th April Evening Shift
34
10 resistors each of resistance 10 $$\Omega$$ can be connected in such as to get maximum and minimum equivalent resistance. The ratio of maximum and minimum equivalent resistance will be ___________.
JEE Main 2023 (Online) 10th April Morning Shift
35
The number density of free electrons in copper is nearly $$8 \times 10^{28} \mathrm{~m}^{-3}$$. A copper wire has its area of cross section $$=2 \times 10^{-6} \mathrm{~m}^{2}$$ and is carrying a current of $$3.2 \mathrm{~A}$$. The drift speed of the electrons is ___________ $$\times 10^{-6} \mathrm{ms}^{-1}$$
JEE Main 2023 (Online) 8th April Evening Shift
36
A current of $$2 \mathrm{~A}$$ flows through a wire of cross-sectional area $$25.0 \mathrm{~mm}^{2}$$. The number of free electrons in a cubic meter are $$2.0 \times 10^{28}$$. The drift velocity of the electrons is __________ $$\times 10^{-6} \mathrm{~ms}^{-1}$$ (given, charge on electron $$=1.6 \times 10^{-19} \mathrm{C}$$ ).
JEE Main 2023 (Online) 8th April Morning Shift
37
JEE Main 2023 (Online) 6th April Evening Shift
38
The length of a metallic wire is increased by $$20 \%$$ and its area of cross section is reduced by $$4 \%$$. The percentage change in resistance of the metallic wire is __________.
JEE Main 2023 (Online) 6th April Morning Shift
39
JEE Main 2023 (Online) 1st February Evening Shift
40
In an experiment to find emf of a cell using potentiometer, the length of null point for a cell of emf $$1.5 \mathrm{~V}$$ is found to be $$60 \mathrm{~cm}$$. If this cell is replaced by another cell of emf E, the length-of null point increases by $$40 \mathrm{~cm}$$. The value of $$E$$ is $$\frac{x}{10} V$$. The value of $$x$$ is ____________.
JEE Main 2023 (Online) 1st February Morning Shift
41
Two identical cells, when connected either in parallel or in series gives same current in an external resistance $$5 ~\Omega$$. The internal resistance of each cell will be ___________ $$\Omega$$.
JEE Main 2023 (Online) 31st January Morning Shift
42
JEE Main 2023 (Online) 30th January Evening Shift
43
JEE Main 2023 (Online) 30th January Morning Shift
44
A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by 5$$\Omega$$. When a resistance of 15$$\Omega$$ is used for shunting, null point moves to 300 cm. The internal resistance of the cell is ___________$$\Omega$$.
JEE Main 2023 (Online) 29th January Evening Shift
45
When two resistance $$\mathrm{R_1}$$ and $$\mathrm{R_2}$$ connected in series and introduced into the left gap of a meter bridge and a resistance of 10 $$\Omega$$ is introduced into the right gap, a null point is found at 60 cm from left side. When $$\mathrm{R_1}$$ and $$\mathrm{R_2}$$ are connected in parallel and introduced into the left gap, a resistance of 3 $$\Omega$$ is introduced into the right gap to get null point at 40 cm from left end. The product of $$\mathrm{R_1}$$ $$\mathrm{R_2}$$ is ____________$$\Omega^2$$
JEE Main 2023 (Online) 29th January Evening Shift
46
In a metre bridge experiment the balance point is obtained if the gaps are closed by 2$$\Omega$$ and 3$$\Omega$$. A shunt of X $$\Omega$$ is added to 3$$\Omega$$ resistor to shift the balancing point by 22.5 cm. The value of X is ___________.
JEE Main 2023 (Online) 29th January Morning Shift
47
JEE Main 2023 (Online) 25th January Evening Shift
48
JEE Main 2023 (Online) 25th January Morning Shift
49
If a copper wire is stretched to increase its length by 20%. The percentage increase in resistance of the wire is __________%.
JEE Main 2023 (Online) 24th January Evening Shift
50
A hollow cylindrical conductor has length of 3.14 m, while its inner and outer diameters are 4 mm and 8 mm respectively. The resistance of the conductor is $$n\times10^{-3}\Omega$$. If the resistivity of the material is $$\mathrm{2.4\times10^{-8}\Omega m}$$. The value of $$n$$ is ___________.
JEE Main 2023 (Online) 24th January Morning Shift
51
JEE Main 2022 (Online) 29th July Morning Shift
52
An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220 V, 60 W. If the voltage across combination is 220 V, the power consumed by the 100 W bulb will be about _______ W.
JEE Main 2022 (Online) 28th July Evening Shift
53
JEE Main 2022 (Online) 28th July Morning Shift
54
JEE Main 2022 (Online) 27th July Evening Shift
55
JEE Main 2022 (Online) 27th July Morning Shift
56
JEE Main 2022 (Online) 27th July Morning Shift
57
A potentiometer wire of length $$300 \mathrm{~cm}$$ is connected in series with a resistance 780 $$\Omega$$ and a standard cell of emf $$4 \mathrm{V}$$. A constant current flows through potentiometer wire. The length of the null point for cell of emf $$20\, \mathrm{mV}$$ is found to be $$60 \mathrm{~cm}$$. The resistance of the potentiometer wire is ____________ $$\Omega$$.
JEE Main 2022 (Online) 26th July Evening Shift
58
JEE Main 2022 (Online) 26th July Morning Shift
59
In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now replaced by another cell of emf 1.80 V. The difference in balancing length of potentiometer wire in above conditions will be ___________ cm.
JEE Main 2022 (Online) 25th July Evening Shift
60
JEE Main 2022 (Online) 25th July Morning Shift
61
Eight copper wire of length $$l$$ and diameter $$d$$ are joined in parallel to form a single composite conductor of resistance $$R$$. If a single copper wire of length $$2 l$$ have the same resistance $$(R)$$ then its diameter will be ____________ d.
JEE Main 2022 (Online) 25th July Morning Shift
62
JEE Main 2022 (Online) 30th June Morning Shift
63
JEE Main 2022 (Online) 29th June Evening Shift
64
JEE Main 2022 (Online) 29th June Morning Shift
65
JEE Main 2022 (Online) 29th June Morning Shift
66
JEE Main 2022 (Online) 28th June Evening Shift
67
JEE Main 2022 (Online) 28th June Morning Shift
68
JEE Main 2022 (Online) 28th June Morning Shift
69
The current density in a cylindrical wire of radius r = 4.0 mm is 1.0 $$\times$$ 10
6
A/m
2
. The current through the outer portion of the wire between radial distances $${r \over 2}$$ and r is x$$\pi$$ A; where x is __________.
JEE Main 2022 (Online) 27th June Evening Shift
70
JEE Main 2022 (Online) 27th June Evening Shift
71
A cell, shunted by a 8 $$\Omega$$ resistance, is balanced across a potentiometer wire of length 3 m. The balancing length is 2 m when the cell is shunted by 4 $$\Omega$$ resistance. The value of internal resistance of the cell will be ____________ $$\Omega$$.
JEE Main 2022 (Online) 27th June Morning Shift
72
The current density in a cylindrical wire of radius 4 mm is 4 $$\times$$ 10
6
Am
$$-$$2
. The current through the outer portion of the wire between radial distances $${R \over 2}$$ and R is ____________ $$\pi$$ A.
JEE Main 2022 (Online) 27th June Morning Shift
73
The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance of the wire will be ____________ %.
JEE Main 2022 (Online) 25th June Evening Shift
74
A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10 s is ____________ J.
JEE Main 2022 (Online) 25th June Morning Shift
75
JEE Main 2022 (Online) 25th June Morning Shift
76
A potentiometer wire of length 10 m and resistance 20 $$\Omega$$ is connected in series with a 25 V battery and an external resistance 30 $$\Omega$$. A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of E (in volt) is $${x \over {10}}$$. The value of x is __________.
JEE Main 2022 (Online) 24th June Evening Shift
77
In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now replaced by another cell of unknown emf. If the ratio of the emf's of two cells respectively is 3 : 2, the difference in the balancing length of the potentiometer wire in above two cases will be ___________ cm.
JEE Main 2022 (Online) 24th June Morning Shift
78
A uniform heating wire of resistance 36$$\Omega$$ is connected across a potential difference of 240 V. The wire is then cut into half and potential difference of 240V is applied across each half separately. The ratio of power dissipation in first case to the total power dissipation in the second case would be 1 : x, where x is ____________
JEE Main 2021 (Online) 1st September Evening Shift
79
A resistor dissipates 192 J of energy in 1s when a current of 4A is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in 5s in _________ J.
JEE Main 2021 (Online) 31st August Evening Shift
80
A square shaped wire with resistance of each side 3$$\Omega$$ is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in unit of $$\Omega$$ will be ___________.
JEE Main 2021 (Online) 31st August Morning Shift
81
JEE Main 2021 (Online) 31st August Morning Shift
82
JEE Main 2021 (Online) 27th August Evening Shift
83
First, a set of n equal resistors of 10 $$\Omega$$ each are connected in series to a battery of emf 20V and internal resistance 10$$\Omega$$. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is ............... .
JEE Main 2021 (Online) 27th August Morning Shift
84
JEE Main 2021 (Online) 27th July Evening Shift
85
A 16 $$\Omega$$ wire is bend to form a square loop. A 9V supply having internal resistance of 1$$\Omega$$ is connected across one of its sides. The potential drop across the diagonals of the square loop is _______________ $$\times$$ 10
$$-$$1
V
JEE Main 2021 (Online) 25th July Evening Shift
86
An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The resistance 'R' that must be put in series with the bulb so that the bulb delivers the same power is _____________ $$\Omega$$.
JEE Main 2021 (Online) 25th July Morning Shift
87
In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5$$\Omega$$. However, it provides a potential difference of 1 V across a load resistance of 2$$\Omega$$. The emf of the cell is given by $${x \over {10}}V$$. Then the value of x is ______________.
JEE Main 2021 (Online) 22th July Evening Shift
88
JEE Main 2021 (Online) 20th July Evening Shift
89
Two wires of same length and thickness having specific resistances 6$$\Omega$$ cm and 3$$\Omega$$ cm respectively are connected in parallel. The effective resistivity is $$\rho$$$$\Omega$$ cm. The value of $$\rho$$, to the nearest integer, is ____________.
JEE Main 2021 (Online) 18th March Evening Shift
90
JEE Main 2021 (Online) 18th March Evening Shift
91
JEE Main 2021 (Online) 18th March Morning Shift
92
The equivalent resistance of series combination of two resistors is 's'. When they are connected in parallel, the equivalent resistance is 'p'. If s = np, then the minimum value for n is ____________. (Round off to the Nearest Integer)
JEE Main 2021 (Online) 17th March Morning Shift
93
The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is ___________$$\Omega$$. (Round off to the Nearest Integer)
JEE Main 2021 (Online) 16th March Evening Shift
94
JEE Main 2021 (Online) 16th March Morning Shift
95
In an electrical circuit, a battery is connected to pass 20C of charge through it in a certain given time. The potential difference between two plates of the battery is maintained at 15V. The workdone by the battery is __________J.
JEE Main 2021 (Online) 26th February Morning Shift
96
JEE Main 2021 (Online) 25th February Evening Shift
97
JEE Main 2021 (Online) 25th February Morning Shift
98
A cylindrical wire of radius 0.5 mm and conductivity 5 $$\times$$ 10
7
S/m is subjected to an electric field of 10 mV/m. The expected value of current in the wire will be x
3
$$\pi$$ mA. The value of x is _________.
JEE Main 2021 (Online) 24th February Evening Shift
99
Four resistances 40 $$\Omega $$, 60 $$\Omega $$, 90 $$\Omega $$ and 110 $$\Omega $$ make the arms of a quadrilateral ABCD. Across AC is
a battery of emf 40 V and internal resistance negligible.The potential difference across BD in V is
_______.
JEE Main 2020 (Online) 4th September Evening Slot
100
In a meter bridge experiment S is a standard
resistance. R is a resistance wire. It is found
that balancing length is $$l$$ = 25 cm. If R is
replaced by a wire of half length and half
diameter that of R of same material, then the
balancing distance $$l'$$ (in cm) will now
be________.
JEE Main 2020 (Online) 9th January Evening Slot
101
The series combination of two batteries, both
of the same emf 10 V, but different internal
resistance of 20$$\Omega $$ and 5$$\Omega $$, is connected to the
parallel combination of two resistors 30$$\Omega $$ and
R $$\Omega $$. The voltage difference across the battery
of internal resistance 20$$\Omega $$ is zero, the value of
R (in $$\Omega $$) is : _______
JEE Main 2020 (Online) 8th January Evening Slot
102
Four resistances of 15$$\Omega $$, 12$$\Omega $$, 4$$\Omega $$ and 10$$\Omega $$
respectively in cyclic order to form
Wheatstone's network. The resistance that
is to be connected in parallel with the
resistance of 10$$\Omega $$ to balance the network is
_____$$\Omega $$.
JEE Main 2020 (Online) 8th January Morning Slot
103
The balancing length for a cell is 560 cm in a potentiometer experiment. When an external
resistance of 10 $$\Omega $$ is connected in parallel to the cell, the balancing length changes by 60 cm. If
the internal resistance of the ceil is $${N \over {10}}$$
$$\Omega $$ , where N is an integer then value of N is .............
JEE Main 2020 (Online) 7th January Evening Slot |
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# Current Electricity · Physics · JEE Main
[MCQ (Single Correct Answer) 270](https://questions.examside.com/past-years/jee/question/pwhich-one-of-the-following-is-bnotb-a-measurable-qua-jee-main-physics-3rh0gmkgmyjnsvwe)
[Numerical 103](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-the-points-a-and-b-jee-main-physics-units-and-measurements-ajmrixszs7mmpzyt)
[Start Practice](https://questions.examside.com/past-years/jee/question/pwhich-one-of-the-following-is-bnotb-a-measurable-qua-jee-main-physics-3rh0gmkgmyjnsvwe)
2002 to 2026 PYQ Statistics
## MCQ (Single Correct Answer)
[1 Which one of the following is **not** a measurable quantity? JEE Main 2026 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwhich-one-of-the-following-is-bnotb-a-measurable-qua-jee-main-physics-3rh0gmkgmyjnsvwe)
[2 A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances (\$R\_1 = R\_2 = R\_3 = R\_4\$). When \$R\_3\$ resistance is heated to some temperature, its resistance value has gone up by 10%. The potential difference (\$V\_a - V\_b\$) (after \$R\_3\$ is heated) is \_\_\_\_\_\_\_\_\_ V.  JEE Main 2026 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-wheatstone-bridge-is-initially-at-room-temperature-and-jee-main-physics-y8ipqmlevbccyczi)
[3 For the two cells having same EMF \$E\$ and internal resistance \$r\$, the current passing through the external resistor \$6 \\Omega\$ is same when both the cells are connected either in parallel or in series. The value of internal resistance \$r\$ is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$. JEE Main 2026 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pfor-the-two-cells-having-same-emf-e-and-internal-resist-jee-main-physics-units-and-measurements-m8oudqivijh5thsd)
[4 In the potentiometer, when the cell in the secondary circuit is shunted with \$4 \\Omega\$ resistance, the balance is obtained at the length 120 cm of wire. Now when the same cell is shunted with \$12 \\Omega\$ resistance, the balance is shifted to a length of 180 cm . The internal resistance of cell is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$ JEE Main 2026 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-potentiometer-when-the-cell-in-the-secondary-circ-jee-main-physics-units-and-measurements-fyh5ffzrfxyw7uij)
[5 The reading of the ammeter \$(A)\$ in steady state in the following circuit (assuming negligible internal resistance of the ammeter) is \$\\\_\\\_\\\_\\\_\$ A.  JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-reading-of-the-ammeter-a-in-steady-state-in-the-f-jee-main-physics-units-and-measurements-ykj9i65wry0c6w74)
[6 A moving coil galvanometer of resistance \$100 \\Omega\$ shows a full scale deflection for a current of 1 mA . The value of resistance required to convert this galvanometer into an ammeter, showing full scale deflection for a current of 5 mA , is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$ JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-moving-coil-galvanometer-of-resistance-100-omega-sho-jee-main-physics-units-and-measurements-vpusylnw7kbm5sdo)
[7 A regular hexagon is formed by six wires each of resistance \$r \\Omega\$ and the corners are joined to the centre by wires of same resistance. If the current enters at one corner and leaves at the opposite corner, the equivalent resistance of the hexagon between the two opposite corners will be JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-regular-hexagon-is-formed-by-six-wires-each-of-resistan-jee-main-physics-units-and-measurements-ymk21lxwct2czae9)
[8 Two resistors of \$100 \\Omega\$ each are connected in series with a 9 V battery. A voltmeter of \$400 \\Omega\$ resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is \$\\\_\\\_\\\_\\\_\$ V. JEE Main 2026 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistors-of-100-omega-each-are-connected-in-serie-jee-main-physics-units-and-measurements-cnte7hnlt8ttvnnz)
[9 Two resistors \$2 \\Omega\$ and \$3 \\Omega\$ are connected in the gaps of bridge as shown in figure. The null point is obtained with the contact of jockey at some point on wire \$X Y\$. When an unknown resistor is connected in parallel with \$3 \\Omega\$ resistor, the null point is shifted by 22.5 cm toward \$Y\$. The resistance of unknown resistor is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$.  JEE Main 2026 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistors-2-omega-and-3-omega-are-connected-in-jee-main-physics-units-and-measurements-ktc28fb4oothwlld)
[10 To compare EMF of two cells using potentiometer the balancing lengths obtained are 200 cm and 150 cm . The least count of scale is 1 cm . The percentage error in the ratio of EMFs is \$\\\_\\\_\\\_\\\_\$ JEE Main 2026 (Online) 23rd January Evening Shift](https://questions.examside.com/past-years/jee/question/pto-compare-emf-of-two-cells-using-potentiometer-the-balan-jee-main-physics-units-and-measurements-dufmemsx5mewwto9)
[11 A wire of uniform resistance \$\\lambda \\Omega / \\mathrm{m}\$ is bent into a circle of radius \$r\$ and another piece of wire with length \$2 r\$ is connected between points \$A\$ and \$B(\\mathrm{AOB})\$ as shown in figure. The equivalent resistance between points \$A\$ and \$B\$ is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$.  JEE Main 2026 (Online) 23rd January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-uniform-resistance-lambda-omega--mathrmm-jee-main-physics-units-and-measurements-cu8xvjpvjimhfghw)
[12 An electric power line having total resistance of \$2 \\Omega\$, delivers 1 kW of power at 250 V . The percentage efficiency of transmission line is \$\\\_\\\_\\\_\\\_\$ . JEE Main 2026 (Online) 22nd January Evening Shift](https://questions.examside.com/past-years/jee/question/pan-electric-power-line-having-total-resistance-of-2-ome-jee-main-physics-units-and-measurements-saqwpil9ts1czrbq)
[13 A meter bridge with two resistances \$R\_1\$ and \$R\_2\$ as shown in figure was balanced (null point) at 40 cm from the point \$P\$. The null point changed to 50 cm from the point \$P\$, when \$16 \\Omega\$ resistance is connected in parallel to \$R\_2\$. The values of resistances \$R\_1\$ and \$R\_2\$ are \$\\\_\\\_\\\_\\\_\$ .  JEE Main 2026 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/a-meter-bridge-with-two-resistances-r1-and-r2-as-shown-jee-main-physics-units-and-measurements-cq3nq02rgjat6pxr)
[14 Two known resistances of \$R\\ \\Omega\$ and \$2R\\ \\Omega\$ and one unknown resistance \$X\\ \\Omega\$ are connected in a circuit as shown in the figure. If the equivalent resistance between points \$A\$ and \$B\$ in the circuit is \$X\\ \\Omega\$, then the value of \$X\$ is \_\_\_\_\_\_\_\_\_\_ \$\\Omega\$.  JEE Main 2026 (Online) 21st January Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-known-resistances-of-r-omega-and-2r-omega-and-jee-main-physics-mypnrfs6ejvu56mo)
[15 The total length of potentiometer wire AB is 50 cm in the arrangement as shown in the figure. If *P* is the point where the galvanometer shows zero reading then the length AP is \_\_\_\_\_\_\_\_ cm.  JEE Main 2026 (Online) 21st January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-total-length-of-potentiometer-wire-ab-is-50-cm-in-the-jee-main-physics-dp4qfyqbbtody1se)
[16 A battery with EMF \$E\$ and internal resistance \$r\$ is connected across a resistance \$R\$. The power consumption in \$R\$ will be maximum when: JEE Main 2026 (Online) 21st January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-battery-with-emf-e-and-internal-resistance-r-is-con-jee-main-physics-t6wxsdkalwwwew8p)
[17 A wire of resistance \$R\$ is bent into a triangular pyramid as shown in figure with each segment having same length. The resistance between points \$A\$ and \$B\$ is \$R / n\$. The value of \$n\$ is :  JEE Main 2025 (Online) 7th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-r-is-bent-into-a-triangular-pyrami-jee-main-physics-units-and-measurements-olpknthnchhzit6l)
[18 There are ' \$n\$ ' number of identical electric bulbs, each is designed to draw a power \$p\$ independently from the mains supply. They are now joined in series across the mains supply. The total power drawn by the combination is : JEE Main 2025 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthere-are--n--number-of-identical-electric-bulbs-eac-jee-main-physics-units-and-measurements-p7nig5n8uihcs7x8)
[19 From the combination of resistors with resistances values \$R\_1=R\_2=R\_3=5 \\Omega\$ and \$R\_4=10 \\Omega\$, which of the following combination is the best circuit to get an equivalent resistance of \$6 \\Omega\$ ? JEE Main 2025 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/pfrom-the-combination-of-resistors-with-resistances-values-jee-main-physics-units-and-measurements-zjdeve71uha6kkwn)
[20 Current passing through a wire as function of time is given as \$I(t)=0.02 t+0.01 \\mathrm{~A}\$. The charge that will flow through the wire from \$t=1 \\mathrm{~s}\$ to \$t=2 \\mathrm{~s}\$ is JEE Main 2025 (Online) 4th April Morning Shift](https://questions.examside.com/past-years/jee/question/pcurrent-passing-through-a-wire-as-function-of-time-is-giv-jee-main-physics-units-and-measurements-normuhmvbf8njmey)
[21 A motor operating on 100 V draws a current of 1 A . If the efficiency of the motor is \$91.6 \\%\$, then the loss of power in units of \$\\mathrm{cal} / \\mathrm{s}\$ is JEE Main 2025 (Online) 3rd April Evening Shift](https://questions.examside.com/past-years/jee/question/a-motor-operating-on-100-v-draws-a-current-of-1-a--if-the-e-jee-main-physics-units-and-measurements-72eiztwlz4p74x6u)
[22 A wire of length 25 m and cross-sectional area \$5 \\mathrm{~mm}^2\$ having resistivity of \$2 \\times 10^{-6} \\Omega \\mathrm{~m}\$ is bent into a complete circle. The resistance between diametrically opposite points will be JEE Main 2025 (Online) 3rd April Morning Shift](https://questions.examside.com/past-years/jee/question/a-wire-of-length-25-m-and-cross-sectional-area-5-mathrmm-jee-main-physics-units-and-measurements-s2orlk7myx2lx64x)
[23 The battery of a mobile phone is rated as \$4.2 \\mathrm{~V}, 5800 \\mathrm{~mAh}\$. How much energy is stored ir it when fully charged? JEE Main 2025 (Online) 2nd April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-battery-of-a-mobile-phone-is-rated-as-42-mathrmv-jee-main-physics-units-and-measurements-initugic8wxwswn0)
[24 Given below are two statements : one is labelled as **Assertion (A)** and the other is labelled as **Reason (R)**. Assertion (A) : Choke coil is simply a coil having a large inductance but a small resistance. Choke coils are used with fluorescent mercury-tube fittings. If household electric power is directly connected to a mercury tube, the tube will be damaged. Reason (R): By using the choke coil, the voltage across the tube is reduced by a factor \$\\left(R / \\sqrt{R^2+\\omega^2 L^2}\\right)\$, where \$\\omega\$ is frequency of the supply across resistor \$R\$ and inductor \$L\$. If the choke coil were not used, the voltage across the resistor would be the same as the applied voltage. In the light of the above statements, choose the **most appropriate answer** from the options given below : JEE Main 2025 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements--one-is-labelled-as-bas-jee-main-physics-6wzzc0jwotwqtxlj)
[25  In the circuit shown here, assuming threshold voltage of diode is negligibly small, then voltage \$ V\_{AB} \$ is correctly represented by: JEE Main 2025 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/img-srchttpsapp-contentcdnexamgoalnetflywidthim-jee-main-physics-uumayj0jzy2zhbjh)
[26 Find the equivalent resistance between two ends of the following circuit  JEE Main 2025 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pfind-the-equivalent-resistance-between-two-ends-of-the-fo-jee-main-physics-units-and-measurements-9eouhtbbwrq0il9h)
[27 A wire of resistance R is bent into an equilateral triangle and an identical wire is bent into \$a\$ square. The ratio of resistance between the two end points of an edge of the triangle to that of the square is JEE Main 2025 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-r-is-bent-into-an-equilateral-triang-jee-main-physics-units-and-measurements-onmopqmtvc8dtixf)
[28 A galvanometer having a coil of resistance \$30 \\Omega\$ need 20 mA of current for full-scale deflection. If a maximum current of 3 A is to be measured using this galvanometer, the resistance of the shunt to be added to the galvanometer should be \$\\frac{30}{X} \\Omega\$, where \$X\$ is JEE Main 2025 (Online) 23rd January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-galvanometer-having-a-coil-of-resistance-30-omega-ne-jee-main-physics-units-and-measurements-0ydiyrg6rkcjjrmq)
[29 Consider a moving coil galvanomenter (MCG): A. The torsional constant in moving coil galvanometer has dimensions \$\\left\[\\mathrm{ML}^2 \\mathrm{~T}^{-2}\\right\]\$ B. Increasing the current sensitivity may not necessarily increase the voltage sensitivity. C. If we increase number of turns \$(\\mathrm{N})\$ to its double \$(2 \\mathrm{~N})\$, then the voltage sensitivity doubles. D. MCG can be converted into an ammeter by introducing a shunt resistance of large value in parallel with galvanometer. E. Current sensitivity of MCG depends inversely on number of turns of coil. Choose the correct answer from the options given below: JEE Main 2025 (Online) 23rd January Morning Shift](https://questions.examside.com/past-years/jee/question/pconsider-a-moving-coil-galvanomenter-mcgp-pa-the-jee-main-physics-units-and-measurements-yujrubnnqc9fcx4f)
[30 Given below are two statements : Statement-I : The equivalent emf of two nonideal batteries connected in parallel is smaller than either of the two emfs. Statement-II : The equivalent internal resistance of two nonideal batteries connected in parallel is smaller than the internal resistance of either of the two batteries. In the light of the above statements, choose the correct answer from the options given below. JEE Main 2025 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements-p-pstatement-i--the-jee-main-physics-units-and-measurements-qw3yoouvvyp9sida)
[31 Which of the following resistivity ( \$\\rho\$ ) \$\\mathrm{v} / \\mathrm{s}\$ temperature ( T ) curves is most suitable to be used in wire bound standard resistors? JEE Main 2025 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/pwhich-of-the-following-resistivity--rho--mathrmv-jee-main-physics-units-and-measurements-r2cuek6ycczqfqat)
[32  Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance \$R\_p=1 \\Omega\$ as shown in the figure. An external resistance of \$R\_e=2 \\Omega\$ is connected via the sliding contact. The electric current in the circuit is : JEE Main 2025 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/pimg-srchttpsapp-contentfly-assetsukflywidthim-jee-main-physics-units-and-measurements-cy00y43w6yx4how4)
[33 The effective resistance between \$\$A\$\$ and \$\$B\$\$, if resistance of each resistor is \$\$R\$\$, will be :  JEE Main 2024 (Online) 9th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-effective-resistance-between-a-and-b-if-resi-jee-main-physics-motion-eotuwpogjmz5exk8)
[34 A galvanometer has a coil of resistance \$\$200 \\Omega\$\$ with a full scale deflection at \$\$20 \\mu \\mathrm{A}\$\$. The value of resistance to be added to use it as an ammeter of range \$\$(0-20) \\mathrm{mA}\$\$ is : JEE Main 2024 (Online) 9th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-galvanmeter-has-a-coil-of-resistance-200-omega-wit-jee-main-physics-motion-7mozz7x52qzvkper)
[35 The equivalent resistance between A and B is :  JEE Main 2024 (Online) 9th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-a-and-b-is-p-pim-jee-main-physics-motion-5zijddwiutq6k8vz)
[36 Water boils in an electric kettle in 20 minutes after being switched on. Using the same main supply, the length of the heating element should be \_\_\_\_\_\_\_\_\_ to \_\_\_\_\_\_\_\_\_\_ times of its initial length if the water is to be boiled in 15 minutes. JEE Main 2024 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pwater-boils-in-an-electric-kettle-in-20-minutes-after-bei-jee-main-physics-motion-e9iwxzotyibpdgnt)
[37 In the given circuit, the terminal potential difference of the cell is :  JEE Main 2024 (Online) 8th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-terminal-potential-difference-o-jee-main-physics-motion-d3mzjdni1pnrtc9f)
[38 The number of electrons flowing per second in the filament of a \$\$110 \\mathrm{~W}\$\$ bulb operating at \$\$220 \\mathrm{~V}\$\$ is : (Given \$\$\\mathrm{e}=1.6 \\times 10^{-19} \\mathrm{C}\$\$) JEE Main 2024 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-number-of-electrons-flowing-per-second-in-the-filamen-jee-main-physics-motion-udcydeltssyteyhz)
[39 The value of unknown resistance \$\$(x)\$\$ for which the potential difference between \$\$B\$\$ and \$\$D\$\$ will be zero in the arrangement shown, is :  JEE Main 2024 (Online) 6th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-value-of-unknown-resistance-x-for-which-the-pot-jee-main-physics-motion-xs3dpbw7vqspmipu)
[40 The ratio of heat dissipated per second through the resistance \$\$5 \\Omega\$\$ and \$\$10 \\Omega\$\$ in the circuit given below is:  JEE Main 2024 (Online) 5th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-ratio-of-heat-dissipated-per-second-through-the-resis-jee-main-physics-motion-fkr7duesqomze93m)
[41 A galvanometer of resistance \$\$100 \\Omega\$\$ when connected in series with \$\$400 \\Omega\$\$ measures a voltage of upto \$\$10 \\mathrm{~V}\$\$. The value of resistance required to convert the galvanometer into ammeter to read upto \$\$10 \\mathrm{~A}\$\$ is \$\$x \\times 10^{-2} \\Omega\$\$. The value of \$\$x\$\$ is : JEE Main 2024 (Online) 5th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-galvanometer-of-resistance-100-omega-when-connecte-jee-main-physics-motion-xiwbazezjdcwzfsx)
[42 In the given figure \$\$\\mathrm{R}\_1=10 \\Omega, \\mathrm{R}\_2=8 \\Omega, \\mathrm{R}\_3=4 \\Omega\$\$ and \$\$\\mathrm{R}\_4=8 \\Omega\$\$. Battery is ideal with emf \$\$12 \\mathrm{~V}\$\$. Equivalent resistant of the circuit and current supplied by battery are respectively :  JEE Main 2024 (Online) 5th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-mathrmr110-omega-mathrmr-jee-main-physics-motion-8ca5nxghxb14mkgc)
[43 An electric bulb rated \$\$50 \\mathrm{~W}-200 \\mathrm{~V}\$\$ is connected across a \$\$100 \\mathrm{~V}\$\$ supply. The power dissipation of the bulb is: JEE Main 2024 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/pan-electric-bulb-rated-50-mathrmw-200-mathrmv-jee-main-physics-motion-lovmhqewcurrfuur)
[44 To measure the internal resistance of a battery, potentiometer is used. For \$\$R=10 \\Omega\$\$, the balance point is observed at \$\$l=500 \\mathrm{~cm}\$\$ and for \$\$\\mathrm{R}=1 \\Omega\$\$ the balance point is observed at \$\$l=400 \\mathrm{~cm}\$\$. The internal resistance of the battery is approximately : JEE Main 2024 (Online) 4th April Morning Shift](https://questions.examside.com/past-years/jee/question/pto-measure-the-internal-resistance-of-a-battery-potentio-jee-main-physics-motion-3j943i9qwti5juib)
[45 In a metre-bridge when a resistance in the left gap is \$2 \\Omega\$ and unknown resistance in the right gap, the balance length is found to be \$40 \\mathrm{~cm}\$. On shunting the unknown resistance with \$2 \\Omega\$, the balance length changes by : JEE Main 2024 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/in-a-metre-bridge-when-a-resistance-in-the-left-gap-is-2-o-jee-main-physics-xi86efmngkm1ckcq)
[46 In an ammeter, \$5 \\%\$ of the main current passes through the galvanometer. If resistance of the galvanometer is \$\\mathrm{G}\$, the resistance of ammeter will be : JEE Main 2024 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/in-an-ammeter-5--of-the-main-current-passes-through-the-jee-main-physics-oqudivtfponufj4u)
[47 The reading in the ideal voltmeter \$(\\mathrm{V})\$ shown in the given circuit diagram is :  JEE Main 2024 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/the-reading-in-the-ideal-voltmeter-mathrmv-shown-in-t-jee-main-physics-j2uyrgs4kbwacju6)
[48 A galvanometer has a resistance of \$50 ~\\Omega\$ and it allows maximum current of \$5 \\mathrm{~mA}\$. It can be converted into voltmeter to measure upto \$100 \\mathrm{~V}\$ by connecting in series a resistor of resistance : JEE Main 2024 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/a-galvanometer-has-a-resistance-of-50-omega-and-it-allow-jee-main-physics-j1z35fjkdofhg5br)
[49 By what percentage will the illumination of the lamp decrease if the current drops by 20%? JEE Main 2024 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/pby-what-percentage-will-the-illumination-of-the-lamp-decr-jee-main-physics-motion-ji9ehdxxmh6at9o2)
[50 The resistance per centimeter of a meter bridge wire is \$\$r\$\$, with \$\$X \\Omega\$\$ resistance in left gap. Balancing length from left end is at \$\$40 \\mathrm{~cm}\$\$ with \$\$25 \\Omega\$\$ resistance in right gap. Now the wire is replaced by another wire of \$\$2 r\$\$ resistance per centimeter. The new balancing length for same settings will be at JEE Main 2024 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-resistance-per-centimeter-of-a-meter-bridge-wire-is--jee-main-physics-motion-4i2sfqzcizwsbqgp)
[51 Two conductors have the same resistances at \$\$0^{\\circ} \\mathrm{C}\$\$ but their temperature coefficients of resistance are \$\$\\alpha\_1\$\$ and \$\$\\alpha\_2\$\$. The respective temperature coefficients for their series and parallel combinations are : JEE Main 2024 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-conductors-have-the-same-resistances-at-0circ--jee-main-physics-motion-lwcvgfyt5nmlsdh8)
[52 When a potential difference \$\$V\$\$ is applied across a wire of resistance \$\$R\$\$, it dissipates energy at a rate \$\$W\$\$. If the wire is cut into two halves and these halves are connected mutually parallel across the same supply, the energy dissipation rate will become: JEE Main 2024 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwhen-a-potential-difference-v-is-applied-across-a-wir-jee-main-physics-motion-ui5wl4tcqagtk3w7)
[53 A potential divider circuit is shown in figure. The output voltage V\$\$\_0\$\$ is :  JEE Main 2024 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-potential-divider-circuit-is-shown-in-figure-the-outpu-jee-main-physics-motion-ljob4mt7feaqevbn)
[54 An electric toaster has resistance of \$\$60 \\Omega\$\$ at room temperature \$\$\\left(27^{\\circ} \\mathrm{C}\\right)\$\$. The toaster is connected to a \$\$220 \\mathrm{~V}\$\$ supply. If the current flowing through it reaches \$\$2.75 \\mathrm{~A}\$\$, the temperature attained by toaster is around : ( if \$\$\\alpha=2 \\times 10^{-4}\$\$/\$\$^\\circ \\mathrm{C}\$\$) JEE Main 2024 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pan-electric-toaster-has-resistance-of-60-omega-at-ro-jee-main-physics-motion-zlmjh2fpdrytdrjo)
[55 In the given circuit, the current in resistance R\$\$\_3\$\$ is :  JEE Main 2024 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-current-in-resistance-r3-i-jee-main-physics-motion-98uzsofpc50dumfu)
[56 The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of \$\$24 \\Omega\$\$ is applied. The resistance of galvanometer coil will be : JEE Main 2024 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-deflection-in-moving-coil-galvanometer-falls-from-25-jee-main-physics-units-and-measurements-vvfhpxm3dpp6ucr7)
[57 A galvanometer having coil resistance \$\$10 \\Omega\$\$ shows a full scale deflection for a current of \$\$3 \\mathrm{~mA}\$\$. For it to measure a current of \$\$8 \\mathrm{~A}\$\$, the value of the shunt should be: JEE Main 2024 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-galvanometer-having-coil-resistance-10-omega-shows-jee-main-physics-units-and-measurements-j2mbaw1eixfitpxz)
[58 The electric current through a wire varies with time as \$\$I=I\_0+\\beta t\$\$, where \$\$I\_0=20 \\mathrm{~A}\$\$ and \$\$\\beta=3 \\mathrm{~A} / \\mathrm{s}\$\$. The amount of electric charge crossed through a section of the wire in \$\$20 \\mathrm{~s}\$\$ is : JEE Main 2024 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-electric-current-through-a-wire-varies-with-time-as--jee-main-physics-units-and-measurements-eeycnoem0wfugx8l)
[59 Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across \$\$A\$\$ and \$\$B\$\$, their readings are \$\$V\_1, V\_2\$\$ and \$\$V\_3\$\$. Choose the correct option.  JEE Main 2024 (Online) 27th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthree-voltmeters-all-having-different-internal-resistanc-jee-main-physics-motion-xfyola8b8edhchio)
[60 A current of \$\$200 \\mu \\mathrm{A}\$\$ deflects the coil of a moving coil galvanometer through \$\$60^{\\circ}\$\$. The current to cause deflection through \$\$\\frac{\\pi}{10}\$\$ radian is : JEE Main 2024 (Online) 27th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-current-of-200-mu-mathrma-deflects-the-coil-of-jee-main-physics-motion-tcxutifzp30zsgol)
[61 Wheatstone bridge principle is used to measure the specific resistance \$\$\\left(S\_1\\right)\$\$ of given wire, having length \$\$L\$\$, radius \$\$r\$\$. If \$\$X\$\$ is the resistance of wire, then specific resistance is ; \$\$S\_1=X\\left(\\frac{\\pi r^2}{L}\\right)\$\$. If the length of the wire gets doubled then the value of specific resistance will be : JEE Main 2024 (Online) 27th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwheatstone-bridge-principle-is-used-to-measure-the-specif-jee-main-physics-motion-izkl6bjzdvxzqtb4)
[62 A wire of length \$\$10 \\mathrm{~cm}\$\$ and radius \$\$\\sqrt{7} \\times 10^{-4} \\mathrm{~m}\$\$ connected across the right gap of a meter bridge. When a resistance of \$\$4.5 \\Omega\$\$ is connected on the left gap by using a resistance box, the balance length is found to be at \$\$60 \\mathrm{~cm}\$\$ from the left end. If the resistivity of the wire is \$\$\\mathrm{R} \\times 10^{-7} \\Omega \\mathrm{m}\$\$, then value of \$\$\\mathrm{R}\$\$ is : JEE Main 2024 (Online) 27th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-length-10-mathrmcm-and-radius-sqrt7-jee-main-physics-motion-2ny0iy4vd8kmwolu)
[63 A wire of resistance \$\$\\mathrm{R}\$\$ and length \$\$\\mathrm{L}\$\$ is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be : JEE Main 2024 (Online) 27th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-mathrmr-and-length-mathrm-jee-main-physics-motion-t9yn7pwpss5mrcxa)
[64 For designing a voltmeter of range \$50 \\mathrm{~V}\$ and an ammeter of range \$10 \\mathrm{~mA}\$ using a galvanometer which has a coil of resistance \$54 \\Omega\$ showing a full scale deflection for \$1 \\mathrm{~mA}\$ as in figure.  (A) for voltmeter \$R \\approx 50 \\mathrm{k} \\Omega\$ (B) for ammeter \$\\mathrm{r} \\approx 0.2 \\Omega\$ (C) for ammeter \$\\mathrm{r}=6 \\Omega\$ (D) for voltmeter \$R \\approx 5 \\mathrm{k} \\Omega\$ (E) for voltmeter \$R \\approx 500 \\Omega\$ Choose the correct answer from the options given below: JEE Main 2023 (Online) 15th April Morning Shift](https://questions.examside.com/past-years/jee/question/for-designing-a-voltmeter-of-range-50-mathrmv-and-an-a-jee-main-physics-g0ik1xpvzgtwfwen)
[65 Given below are two statements: **Statement I** : The equivalent resistance of resistors in a series combination is smaller than least resistance used in the combination. **Statement II** : The resistivity of the material is independent of temperature. In the light of the above statements, choose the correct answer from the options given below : JEE Main 2023 (Online) 15th April Morning Shift](https://questions.examside.com/past-years/jee/question/given-below-are-two-statements-brbr-bstatement-ib-jee-main-physics-bnyzqhziozs4s7y7)
[66 Different combination of 3 resistors of equal resistance \$\$\\mathrm{R}\$\$ are shown in the figures. The increasing order for power dissipation is:  JEE Main 2023 (Online) 13th April Morning Shift](https://questions.examside.com/past-years/jee/question/pdifferent-combination-of-3-resistors-of-equal-resistance-jee-main-physics-motion-odskdilh8wopluth)
[67 A wire of resistance \$\$160 ~\\Omega\$\$ is melted and drawn in a wire of one-fourth of its length. The new resistance of the wire will be JEE Main 2023 (Online) 12th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-160-omega-is-melted-and-drawn-jee-main-physics-motion-ejxnxanymcqyvju9)
[68  The current flowing through R\$\$\_2\$\$ is : JEE Main 2023 (Online) 11th April Evening Shift](https://questions.examside.com/past-years/jee/question/pimagep-pthe-current-flowing-through-r2-is-p-jee-main-physics-motion-yvp1kytmybbzivn9)
[69 Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in same time for parallel to series will be: JEE Main 2023 (Online) 11th April Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-heater-filaments-are-connected-first-in-par-jee-main-physics-motion-ohrgvllxtfw9mcve)
[70 The current sensitivity of moving coil galvanometer is increased by \$\$25 \\%\$\$. This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be: JEE Main 2023 (Online) 11th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-sensitivity-of-moving-coil-galvanometer-is-in-jee-main-physics-motion-i9sks4rwbymkmsfs)
[71 The equivalent resistance of the circuit shown below between points a and b is :  JEE Main 2023 (Online) 10th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-of-the-circuit-shown-below-betw-jee-main-physics-motion-j8qtoeolyws5rv6z)
[72 The equivalent resistance between A and B as shown in figure is:  JEE Main 2023 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-a-and-b-as-shown-in-fig-jee-main-physics-motion-vnugfxdlgemlulqx)
[73 Figure shows a part of an electric circuit. The potentials at points \$\$a, b\$\$ and \$\$c\$\$ are \$\$30 \\mathrm{~V}, 12 \\mathrm{~V}\$\$ and \$\$2 \\mathrm{~V}\$\$ respectively. The current through the \$\$20 ~\\Omega\$\$ resistor will be,  JEE Main 2023 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pfigure-shows-a-part-of-an-electric-circuit-the-potential-jee-main-physics-motion-j8iy7mvepsraihzw)
[74 A student is provided with a variable voltage source \$\$\\mathrm{V}\$\$, a test resistor \$\$R\_{T}=10 ~\\Omega\$\$, two identical galvanometers \$\$G\_{1}\$\$ and \$\$G\_{2}\$\$ and two additional resistors, \$\$R\_{1}=10 ~M \\Omega\$\$ and \$\$R\_{2}=0.001 ~\\Omega\$\$. For conducting an experiment to verify ohm's law, the most suitable circuit is: JEE Main 2023 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-student-is-provided-with-a-variable-voltage-source-m-jee-main-physics-motion-ha5vl87jrdi6bcxt)
[75 Given below are two statements : One is labelled as Assertion \$\$\\mathbf{A}\$\$ and the other is labelled as Reason \$\$\\mathbf{R}\$\$. Assertion A : For measuring the potential difference across a resistance of \$\$600 \\Omega\$\$, the voltmeter with resistance \$\$1000 \\Omega\$\$ will be preferred over voltmeter with resistance \$\$4000 \\Omega\$\$. Reason R : Voltmeter with higher resistance will draw smaller current than voltmeter with lower resistance. In the light of the above statements, choose the most appropriate answer from the options given below. JEE Main 2023 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements--one-is-labelled-as-asser-jee-main-physics-motion-megqtumvvusr5r7b)
[76 Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be : JEE Main 2023 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/pequivalent-resistance-between-the-adjacent-corners-of-a-r-jee-main-physics-motion-mrmmsttnrfmpcelf)
[77 The equivalent resistance between \$\$A\$\$ and \$\$B\$\$ of the network shown in figure;  JEE Main 2023 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-a-and-b-of-the-jee-main-physics-motion-4ttr7n26jbqt58db)
[78 The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by \$50 \\%\$. The percentage change in voltage sensitivity of the galvanometer will be : JEE Main 2023 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/the-number-of-turns-of-the-coil-of-a-moving-coil-galvanomete-jee-main-physics-jjoe1prefqrjx0kw)
[79 The \$\\mathrm{H}\$ amount of thermal energy is developed by a resistor in \$10 \\mathrm{~s}\$ when a current of \$4 \\mathrm{~A}\$ is passed through it. If the current is increased to \$16 \\mathrm{~A}\$, the thermal energy developed by the resistor in \$10 \\mathrm{~s}\$ will be : JEE Main 2023 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/the-mathrmh-amount-of-thermal-energy-is-developed-by-a-jee-main-physics-qyvyhomgpneahjqu)
[80 The drift velocity of electrons for a conductor connected in an electrical circuit is \$\$\\mathrm{V}\_{\\mathrm{d}}\$\$. The conductor in now replaced by another conductor with same material and same length but double the area of cross section. The applied voltage remains same. The new drift velocity of electrons will be JEE Main 2023 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-drift-velocity-of-electrons-for-a-conductor-connected-jee-main-physics-motion-imbilgxqhk1pckee)
[81 The equivalent resistance between \$A\$ and \$B\$ is \_\_\_\_\_\_\_\_\_.  JEE Main 2023 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/the-equivalent-resistance-between-a-and-b-is--jee-main-physics-mhcgqzj6ynh8bwkx)
[82 The charge flowing in a conductor changes with time as \$\$\\mathrm{Q}(\\mathrm{t})=\\alpha \\mathrm{t}-\\beta \\mathrm{t}^{2}+\\gamma \\mathrm{t}^{3}\$\$. Where \$\$\\alpha, \\beta\$\$ and \$\$\\gamma\$\$ are constants. Minimum value of current is : JEE Main 2023 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-charge-flowing-in-a-conductor-changes-with-time-as--jee-main-physics-motion-l8tuoqnc8bteo1ek)
[83 With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the potentiometer is (A) directly proportional to the length of the potentiometer wire (B) directly proportional to the potential gradient of the wire (C) inversely proportional to the potential gradient of the wire (D) inversely proportional to the length of the potentiometer wire Choose the correct option for the above statements : JEE Main 2023 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwith-the-help-of-potentiometer-we-can-determine-the-valu-jee-main-physics-motion-iqictnrfbocj912h)
[84 Ratio of thermal energy released in two resistors R and 3R connected in parallel in an electric circuit is : JEE Main 2023 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pratio-of-thermal-energy-released-in-two-resistors-r-and-3-jee-main-physics-motion-nxninn9a3pmvlyeg)
[85 The resistance of a wire is 5 \$\$\\Omega\$\$. It's new resistance in ohm if stretched to 5 times of it's original length will be : JEE Main 2023 (Online) 25th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-resistance-of-a-wire-is-5-omega-its-new-resist-jee-main-physics-motion-rddrrr6a1pb9gxvf)
[86 A uniform metallic wire carries a current 2 A, when 3.4 V battery is connected across it. The mass of uniform metallic wire is 8.92 \$\$\\times\$\$ 10\$\$^{-3}\$\$ kg, density is 8.92 \$\$\\times\$\$ 10\$\$^{3}\$\$ kg/m\$\$^3\$\$ and resistivity is 1.7 \$\$\\times\$\$ 10\$\$^{-8}~\\Omega\$\$-\$\$\\mathrm{m}\$\$. The length of wire is : JEE Main 2023 (Online) 25th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-uniform-metallic-wire-carries-a-current-2-a-when-34-v-jee-main-physics-motion-cv62nsibx378kmrc)
[87 A cell of emf 90 V is connected across series combination of two resistors each of 100\$\$\\Omega\$\$ resistance. A voltmeter of resistance 400\$\$\\Omega\$\$ is used to measure the potential difference across each resistor. The reading of the voltmeter will be : JEE Main 2023 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-cell-of-emf-90-v-is-connected-across-sides-combination-jee-main-physics-motion-l6x58zy6pfxmcgd8)
[88 As shown in the figure, a network of resistors is connected to a battery of 24V with an internal resistance of 3 \$\$\\Omega\$\$. The currents through the resistors R\$\$\_4\$\$ and R\$\$\_5\$\$ are I\$\$\_4\$\$ and I\$\$\_5\$\$ respectively. The values of I\$\$\_4\$\$ and I\$\$\_5\$\$ are :  JEE Main 2023 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/pas-shown-in-the-figure-a-network-of-resistors-is-connect-jee-main-physics-motion-txwdwv5suoarjcf6)
[89 Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Alloys such as constantan and manganin are used in making standard resistance coils. Reason R: Constantan and manganin have very small value of temperature coefficient of resistance. In the light of the above statements, choose the correct answer from the options given below. JEE Main 2022 (Online) 29th July Evening Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements-one-is-labelled-as-assert-jee-main-physics-motion-nlwtbdy32ruqeva8)
[90 A \$\$1 \\mathrm{~m}\$\$ long wire is broken into two unequal parts \$\$\\mathrm{X}\$\$ and \$\$\\mathrm{Y}\$\$. The \$\$\\mathrm{X}\$\$ part of the wire is streched into another wire W. Length of \$\$W\$\$ is twice the length of \$\$X\$\$ and the resistance of \$\$\\mathrm{W}\$\$ is twice that of \$\$\\mathrm{Y}\$\$. Find the ratio of length of \$\$\\mathrm{X}\$\$ and \$\$\\mathrm{Y}\$\$. JEE Main 2022 (Online) 29th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-1-mathrmm-long-wire-is-broken-into-two-unequal-jee-main-physics-motion-cifuriygzxqetloz)
[91 Two metallic wires of identical dimensions are connected in series. If \$\$\\sigma\_{1}\$\$ and \$\$\\sigma\_{2}\$\$ are the conductivities of the these wires respectively, the effective conductivity of the combination is : JEE Main 2022 (Online) 29th July Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-metallic-wires-of-identical-dimensions-are-connected-jee-main-physics-motion-ai3qhqeh0x7w8zfw)
[92 Given below are two statements : Statement I : A uniform wire of resistance \$\$80 \\,\\Omega\$\$ is cut into four equal parts. These parts are now connected in parallel. The equivalent resistance of the combination will be \$\$5 \\,\\Omega\$\$. Statement II: Two resistances 2R and 3R are connected in parallel in a electric circuit. The value of thermal energy developed in 3R and 2R will be in the ratio \$\$3: 2\$\$. In the light of the above statements, choose the most appropriate answer from the option given below JEE Main 2022 (Online) 28th July Evening Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements-p-pstatement-i--a-u-jee-main-physics-motion-6h5qfx1wbzmpqbgp)
[93 A wire of resistance R1 is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is : JEE Main 2022 (Online) 28th July Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-rsub1sub-is-drawn-out-so-that-i-jee-main-physics-motion-nklmnvn2lyc9cknr)
[94 (A) The drift velocity of electrons decreases with the increase in the temperature of conductor. (B) The drift velocity is inversely proportional to the area of cross-section of given conductor. (C) The drift velocity does not depend on the applied potential difference to the conductor. (D) The drift velocity of electron is inversely proportional to the length of the conductor. (E) The drift velocity increases with the increase in the temperature of conductor. Choose the correct answer from the options given below : JEE Main 2022 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-the-drift-velocity-of-electrons-decreases-with-the-in-jee-main-physics-motion-kwpslcozxhamfvnq)
[95 Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The internal resistances of the two sources are \$\$r\_{1}\$\$ and \$\$r\_{2}\$\$ \$\$\\left(r\_{1}\>r\_{2}\\right)\$\$. If the potential difference across the source of internal resistance \$\$r\_{1}\$\$ is zero, then the value of R will be : JEE Main 2022 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-sources-of-equal-emfs-are-connected-in-series-this-c-jee-main-physics-motion-pgv9ttcmkrhxq9uo)
[96 A battery of \$\$6 \\mathrm{~V}\$\$ is connected to the circuit as shown below. The current I drawn from the battery is :  JEE Main 2022 (Online) 26th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-battery-of-6-mathrmv-is-connected-to-the-circui-jee-main-physics-motion-b83tuc3wsnyc0hpb)
[97 The current I in the given circuit will be :  JEE Main 2022 (Online) 26th July Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-i-in-the-given-circuit-will-be-p-pimage-jee-main-physics-motion-wd7f4agvxb87glh6)
[98 A current of 15 mA flows in the circuit as shown in figure. The value of potential difference between the points A and B will be:  JEE Main 2022 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-current-of-15-ma-flows-in-the-circuit-as-shown-in-figur-jee-main-physics-motion-x7rd8s7vr3favcvr)
[99 Which of the following physical quantities have the same dimensions? JEE Main 2022 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/pwhich-of-the-following-physical-quantities-have-the-same-jee-main-physics-motion-zqmlzzximnqiu4wa)
[100 An electric cable of copper has just one wire of radius 9 mm. Its resistance is 14 \$\$\\Omega\$\$. If this single copper wire of the cable is replaced by seven identical well insulated copper wires each of radius 3 mm connected in parallel, then the new resistance of the combination will be : JEE Main 2022 (Online) 30th June Morning Shift](https://questions.examside.com/past-years/jee/question/pan-electric-cable-of-copper-has-just-one-wire-of-radius-9-jee-main-physics-motion-jjj0ytlz5qr8zyhc)
[101 The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of 2\$\$\\Omega\$\$. The value of internal resistance of each cell is JEE Main 2022 (Online) 29th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-combination-of-two-identical-cells-whether-connected-jee-main-physics-motion-dsy7ehfthpnq3q3x)
[102 Resistance of the wire is measured as 2 \$\$\\Omega\$\$ and 3 \$\$\\Omega\$\$ at 10\$\$^\\circ\$\$C and 30\$\$^\\circ\$\$C respectively. Temperature co-efficient of resistance of the material of the wire is : JEE Main 2022 (Online) 28th June Evening Shift](https://questions.examside.com/past-years/jee/question/presistance-of-the-wire-is-measured-as-2-omega-and-3-jee-main-physics-motion-dtdtff3jwacwt8do)
[103 A 72 \$\$\\Omega\$\$ galvanometer is shunted by a resistance of 8 \$\$\\Omega\$\$. The percentage of the total current which passes through the galvanometer is : JEE Main 2022 (Online) 27th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-72-omega-galvanometer-is-shunted-by-a-resistance-o-jee-main-physics-motion-sq2phkcaxinz4yhh)
[104 The equivalent resistance between points A and B in the given network is :  JEE Main 2022 (Online) 26th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-points-a-and-b-in-the-g-jee-main-physics-motion-gtdaqnfbevujrsjw)
[105 An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is : JEE Main 2022 (Online) 26th June Morning Shift](https://questions.examside.com/past-years/jee/question/pan-aluminium-wire-is-stretched-to-make-its-length-04-l-jee-main-physics-motion-l8wgeuazqvqk3vke)
[106 Two cells of same emf but different internal resistances r1 and r2 are connected in series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, is : JEE Main 2022 (Online) 25th June Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-of-same-emf-but-different-internal-resistances-jee-main-physics-motion-qoewe9ii1qym1apk)
[107 If n represents the actual number of deflections in a converted galvanometer of resistance G and shunt resistance S. Then the total current I when its figure of merit is K will be: JEE Main 2022 (Online) 25th June Evening Shift](https://questions.examside.com/past-years/jee/question/pif-n-represents-the-actual-number-of-deflections-in-a-con-jee-main-physics-motion-deb8pspl5vsvftlr)
[108 A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for \$\${1 \\over 3}\$\$ deflection in the galvanometer. Which of the below is true for measuring value of G? JEE Main 2022 (Online) 25th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-teacher-in-his-physics-laboratory-allotted-an-experimen-jee-main-physics-motion-qtapwebhj36mj47h)
[109 What will be the most suitable combination of three resistors A = 2\$\$\\Omega\$\$, B = 4\$\$\\Omega\$\$, C = 6\$\$\\Omega\$\$ so that \$\$\\left( {{{22} \\over 3}} \\right)\$\$\$\$\\Omega\$\$ is equivalent resistance of combination? JEE Main 2022 (Online) 24th June Evening Shift](https://questions.examside.com/past-years/jee/question/pwhat-will-be-the-most-suitable-combination-of-three-resis-jee-main-physics-motion-fsihrsukaackc0dq)
[110 Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each of resistance 20 \$\$\\Omega\$\$. A voltmeter connected in the circuit measures 1.2 V. The internal resistance of each cell is : JEE Main 2022 (Online) 24th June Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-cells-each-of-emf-15-v-are-connected-in-pa-jee-main-physics-motion-ayqdxjl7l8lqz6ak)
[111 Due to cold weather a 1 m water pipe of cross-sectional area 1 cm2 is filled with ice at \$\$-\$\$10\$\$^\\circ\$\$C. Resistive heating is used to melt the ice. Current of 0.5A is passed through 4 k\$\$\\Omega\$\$ resistance. Assuming that all the heat produced is used for melting, what is the minimum time required? (Given latent heat of fusion for water/ice = 3.33 \$\$\\times\$\$ 105 J kg\$\$-\$\$1, specific heat of ice = 2 \$\$\\times\$\$ 103 J kg\$\$-\$\$1 and density of ice = 103 kg/m3 JEE Main 2021 (Online) 1st September Evening Shift](https://questions.examside.com/past-years/jee/question/due-to-cold-weather-a-1-m-water-pipe-of-cross-sectional-area-jee-main-physics-units-and-measurements-owy8suqd4h6mvqww)
[112 Two resistors R1 = (4 \$\$\\pm\$\$ 0.8) \$\$\\Omega\$\$ and R2 = (4 \$\$\\pm\$\$ 0.4) \$\$\\Omega\$\$ are connected in parallel. The equivalent resistance of their parallel combination will be : JEE Main 2021 (Online) 1st September Evening Shift](https://questions.examside.com/past-years/jee/question/two-resistors-rsub1sub--4-pm-08-omega-and-jee-main-physics-units-and-measurements-9a7zordge1j2k9uy)
[113 The equivalent resistance of the given circuit between the terminals A and B is :  JEE Main 2021 (Online) 31st August Evening Shift](https://questions.examside.com/past-years/jee/question/the-equivalent-resistance-of-the-given-circuit-between-the-t-jee-main-physics-units-and-measurements-c70amnntnqzeeuyf)
[114 Consider a galvanometer shunted with 5\$\$\\Omega\$\$ resistance and 2% of current passes through it. What is the resistance of the given galvanometer ? JEE Main 2021 (Online) 31st August Morning Shift](https://questions.examside.com/past-years/jee/question/consider-a-galvanometer-shunted-with-5omega-resistance-jee-main-physics-units-and-measurements-e0djld8vbm1o5udl)
[115 The Colour coding on a carbon resistor is shown in the given figure. The resistance value of the given resistor is :  JEE Main 2021 (Online) 27th August Evening Shift](https://questions.examside.com/past-years/jee/question/the-colour-coding-on-a-carbon-resistor-is-shown-in-the-given-jee-main-physics-units-and-measurements-izvssqh7hxchvtlv)
[116 For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanometer if its current sensitivity is 2 div/mA will be : JEE Main 2021 (Online) 27th August Evening Shift](https://questions.examside.com/past-years/jee/question/for-full-scale-deflection-of-total-50-divisions-50-mv-volta-jee-main-physics-units-and-measurements-hxyqbrrs1oxm4jfs)
[117 Five identical cells each of internal resistance 1\$\$\\Omega\$\$ and emf 5V are connected in series and in parallel with an external resistance 'R'. For what value of 'R', current in series and parallel combination will remain the same? JEE Main 2021 (Online) 27th August Morning Shift](https://questions.examside.com/past-years/jee/question/five-identical-cells-each-of-internal-resistance-1omega-jee-main-physics-units-and-measurements-bgy8jildso6ym1rs)
[118 If you are provided a set of resistances 2\$\$\\Omega\$\$, 4\$\$\\Omega\$\$, 6\$\$\\Omega\$\$ and 8\$\$\\Omega\$\$. Connect these resistances so as to obtain an equivalent resistance of \$\${{46} \\over 3}\$\$\$\$\\Omega\$\$. JEE Main 2021 (Online) 26th August Evening Shift](https://questions.examside.com/past-years/jee/question/if-you-are-provided-a-set-of-resistances-2omega-4om-jee-main-physics-units-and-measurements-1e4twhgqbvyy6gxh)
[119 An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W. JEE Main 2021 (Online) 26th August Evening Shift](https://questions.examside.com/past-years/jee/question/an-electric-bulb-of-500-watt-at-100-volt-is-used-in-a-circui-jee-main-physics-units-and-measurements-zdjcp6arvczlf7h9)
[120 In the given figure, the emf of the cell is 2.2 V and if internal resistance is 0.6\$\$\\Omega\$\$. Calculate the power dissipated in the whole circuit :  JEE Main 2021 (Online) 26th August Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-the-emf-of-the-cell-is-22-v-and-if-int-jee-main-physics-units-and-measurements-mab4s59mtsu6wsxf)
[121 What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an equivalent resistance of 3\$\$\\Omega\$\$ ? (Given resistivities of iron and copper-nickel alloy wire are 12 \$\$\\mu\$\$\$\$\\Omega\$\$ and 51 \$\$\\mu\$\$\$\$\\Omega\$\$ cm respectively) JEE Main 2021 (Online) 26th August Morning Shift](https://questions.examside.com/past-years/jee/question/what-equal-length-of-an-iron-wire-and-a-copper-nickel-alloy-jee-main-physics-units-and-measurements-njp5zzym04xrxort)
[122 The resistance of a conductor at 15\$\$^\\circ\$\$C is 16\$\$\\Omega\$\$ and at 100\$\$^\\circ\$\$C is 20\$\$\\Omega\$\$. What will be the temperature coefficient of resistance of the conductor? JEE Main 2021 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/the-resistance-of-a-conductor-at-15circc-is-16omega-jee-main-physics-units-and-measurements-iysmj69re77jvr0j)
[123 In the given figure, a battery of emf E is connected across a conductor PQ of length 'l' and different area of cross-sections having radii r1 and r2 (r2 \< r1).  Choose the correct option as one moves from P to Q : JEE Main 2021 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-a-battery-of-emf-e-is-connected-across-jee-main-physics-units-and-measurements-14ctriy8ymd9uvu6)
[124 In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250 cm. When the galvanometer connection is shifted from point (1) to point (2) in the given diagram, the balancing length becomes 400 cm. The ratio of the emf of two cells, \$\${{{\\varepsilon \_1}} \\over {{\\varepsilon \_2}}}\$\$ is :  JEE Main 2021 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/in-the-given-potentiometer-circuit-arrangement-the-balancin-jee-main-physics-units-and-measurements-updgorgrfvy0davz)
[125 The given potentiometer has its wire of resistance 10\$\$\\Omega\$\$. When the sliding contact is in the middle of the potentiometer wire, the potential drop across 2\$\$\\Omega\$\$ resistor is :  JEE Main 2021 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/the-given-potentiometer-has-its-wire-of-resistance-10omeg-jee-main-physics-units-and-measurements-vdzpzcvmehruwdvy)
[126 In the given figure, there is a circuit of potentiometer of length AB = 10 m. The resistance per unit length is 0.1 \$\$\\Omega\$\$ per cm. Across AB, a battery of emf E and internal resistance 'r' is connected. The maximum value of emf measured by this potentiometer is :  JEE Main 2021 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-there-is-a-circuit-of-potentiometer-of-jee-main-physics-units-and-measurements-aqrbnx6pm99dzzp7)
[127 A Copper (Cu) rod of length 25 cm and cross-sectional area 3 mm2 is joined with a similar Aluminium (Al) rod as shown in figure. Find the resistance of the combination between the ends A and B. (Take Resistivity of Copper = 1.7 \$\$\\times\$\$ 10\$\$-\$\$8 \$\$\\Omega\$\$m and Resistivity of Aluminium = 2.6 \$\$\\times\$\$ 10\$\$-\$\$8 \$\$\\Omega\$\$m)  JEE Main 2021 (Online) 22th July Evening Shift](https://questions.examside.com/past-years/jee/question/a-copper-cu-rod-of-length-25-cm-and-cross-sectional-area-3-jee-main-physics-units-and-measurements-dl0nc8klmfawpuxu)
[128 A current of 5 A is passing through a non-linear magnesium wire of cross-section 0.04 m2. At every point the direction of current density is at an angle of 60\$\$^\\circ\$\$ with the unit vector of area of cross-section. The magnitude of electric field at every point of the conductor is : (Resistivity of magnesium \$\$\\rho\$\$ = 44 \$\$\\times\$\$ 10\$\$-\$\$8 \$\$\\Omega\$\$m) JEE Main 2021 (Online) 20th July Morning Shift](https://questions.examside.com/past-years/jee/question/a-current-of-5-a-is-passing-through-a-non-linear-magnesium-w-jee-main-physics-units-and-measurements-nsilsqyqxihrgdte)
[129  The value of current in the 6 \$\$\\Omega\$\$ resistance is : JEE Main 2021 (Online) 20th July Morning Shift](https://questions.examside.com/past-years/jee/question/imagebrbrthe-value-of-current-in-the-6-omega-resi-jee-main-physics-units-and-measurements-we593jgnjk8j9tec)
[130 In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 cm and diameter of 5.00 mm. The measured current in the conductor is 2.00 A. The maximum permissible percentage error in the resistivity of the conductor is : JEE Main 2021 (Online) 18th March Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-experiment-of-ohms-law-a-potential-difference-of-5-jee-main-physics-units-and-measurements-sdq55yopsoqadw0q)
[131 Two cells of emf 2E and E with internal resistance r1 and r2 respectively are connected in series to an external resistor R (see figure). The value of R, at which the potential difference across the terminals of the first cell becomes zero is  JEE Main 2021 (Online) 17th March Evening Shift](https://questions.examside.com/past-years/jee/question/two-cells-of-emf-2e-and-e-with-internal-resistance-rsub1-jee-main-physics-units-and-measurements-bpot0dx0exrkkxki)
[132 The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of 15\$\$\\Omega\$\$ resistance is connected across BD. Calculate the current through the galvanometer when a potential difference of 10V is maintained across AC.  JEE Main 2021 (Online) 17th March Evening Shift](https://questions.examside.com/past-years/jee/question/the-four-arms-of-a-wheatstone-bridge-have-resistances-as-sho-jee-main-physics-units-and-measurements-9akckfsx4ija2nng)
[133 A current of 10A exists in a wire of cross-sectional area of 5 mm2 with a drift velocity of 2 \$\$\\times\$\$ 10\$\$-\$\$3 ms\$\$-\$\$1. The number of free electrons in each cubic meter of the wire is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 17th March Morning Shift](https://questions.examside.com/past-years/jee/question/a-current-of-10a-exists-in-a-wire-of-cross-sectional-area-of-jee-main-physics-units-and-measurements-btcok19roouvbdo9)
[134 A resistor develops 500 J of thermal energy in 20 s when a current of 1.5A is passed through it. If the current is increased from 1.5A to 3A, what will be the energy developed in 20 s. JEE Main 2021 (Online) 16th March Evening Shift](https://questions.examside.com/past-years/jee/question/a-resistor-develops-500-j-of-thermal-energy-in-20-s-when-a-c-jee-main-physics-units-and-measurements-9kker2ggxwxdftjr)
[135 A conducting wire of length 'l', area of cross-section A and electric resistivity \$\$\\rho\$\$ is connected between the terminals of a battery. A potential difference V is developed between its ends, causing an electric current. If the length of the wire of the same material is doubled and the area of cross-section is halved, the resultant current would be : JEE Main 2021 (Online) 16th March Morning Shift](https://questions.examside.com/past-years/jee/question/a-conducting-wire-of-length-l-area-of-cross-section-a-and-jee-main-physics-units-and-measurements-ixmhddaubjrbs9rk)
[136 A wire of 1\$\$\\Omega\$\$ has a length of 1 m. It is stretched till its length increases by 25%. The percentage change in resistance to the nearest integer is : JEE Main 2021 (Online) 26th February Evening Shift](https://questions.examside.com/past-years/jee/question/a-wire-of-1omega-has-a-length-of-1-m-it-is-stretched-t-jee-main-physics-units-and-measurements-qsrcvbgklm6mruse)
[137 Five equal resistances are connected in a network as shown in figure. The net resistance between the points A and B is :  JEE Main 2021 (Online) 26th February Morning Shift](https://questions.examside.com/past-years/jee/question/five-equal-resistances-are-connected-in-a-network-as-shown-i-jee-main-physics-units-and-measurements-l0ajx2a250rfjjeo)
[138 A current through a wire depends on time as i = \$\$\\alpha\$\$0t + \$\$\\beta\$\$t2 where \$\$\\alpha\$\$0 = 20 A/s and \$\$\\beta\$\$ = 8 As\$\$-\$\$2. Find the charge crossed through a section of the wire in 15 s. JEE Main 2021 (Online) 24th February Morning Shift](https://questions.examside.com/past-years/jee/question/a-current-through-a-wire-depends-on-time-as-brbri---jee-main-physics-units-and-measurements-5hhtmt0plo2sioec)
[139 A cell E1 of emf 6V and internal resistance 2\$\$\\Omega\$\$ is connected with another cell E2 of emf 4V and internal resistance 8\$\$\\Omega\$\$ (as shown in the figure). The potential difference across points X and Y is :  JEE Main 2021 (Online) 24th February Morning Shift](https://questions.examside.com/past-years/jee/question/a-cell-esub1sub-of-emf-6v-and-internal-resistance-2o-jee-main-physics-units-and-measurements-82spygavyb8nxs6z)
[140 A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit : JEE Main 2020 (Online) 6th September Evening Slot](https://questions.examside.com/past-years/jee/question/a-circuit-to-verify-ohms-law-uses-ammeter-and-voltmeter-in-jee-main-physics-current-electricity-gzfboi375uvcqvok)
[141 In the figure shown, the current in the 10 V battery is close to :  JEE Main 2020 (Online) 6th September Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-figure-shown-the-current-in-the-10-v-battery-is-clos-jee-main-physics-current-electricity-oydwmw4lbydxrpgx)
[142 In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is :  JEE Main 2020 (Online) 5th September Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-circuit-given-in-the-figure-currents-in-different-br-jee-main-physics-current-electricity-wntc3vmwgki8t16d)
[143 A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of 6 mA it produces a deflection of 2o, its figure of merit is close to : JEE Main 2020 (Online) 5th September Evening Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-is-used-in-laboratory-for-detecting-the-null-jee-main-physics-magnetics-vwidjijg8ilvpbjg)
[144 An electrical power line, having a total resistance of 2 \$\$\\Omega \$\$, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately : JEE Main 2020 (Online) 5th September Morning Slot](https://questions.examside.com/past-years/jee/question/an-electrical-power-line-having-a-total-resistance-of-2--jee-main-physics-current-electricity-m6qe4h6l6vhqsbwt)
[145 A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance R1 in series with it. The additional resistance that should be connected in series with R1 to increase the range of the voltmeter to 0 – 2 V will be : JEE Main 2020 (Online) 5th September Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-of-resistance-g-is-converted-into-a-voltmeter-jee-main-physics-current-electricity-cqdqdskvz9t0ibnz)
[146 The value of current i1 flowing from A to C in the circuit diagram is :  JEE Main 2020 (Online) 4th September Evening Slot](https://questions.examside.com/past-years/jee/question/the-value-of-current-isub1sub-flowing-from-a-to-c-in-t-jee-main-physics-current-electricity-rezeavu8d8vcmooi)
[147 A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is : JEE Main 2020 (Online) 4th September Morning Slot](https://questions.examside.com/past-years/jee/question/a-battery-of-30-v-is-connected-to-a-resistor-dissipating-0-jee-main-physics-current-electricity-mwq9wlnwtpvu7w6g)
[148 Two resistors 400\$\$\\Omega \$\$ and 800\$\$\\Omega \$\$ are connected in series across a 6 V battery. The potential difference measured by a voltmeter of 10 k\$\$\\Omega \$\$ across 400 \$\$\\Omega \$\$ resistor is close to : JEE Main 2020 (Online) 3rd September Evening Slot](https://questions.examside.com/past-years/jee/question/two-resistors-400omega--and-800omega--are-connect-jee-main-physics-current-electricity-ltuoolbgvdvkwky5)
[149 Model a torch battery of length \$\$l\$\$ to be made up of a thin cylindrical bar of radius ‘a’ and a concentric thin cylindrical shell of radius ‘b’ filled in between with an electrolyte of resistivity \$\$\\rho \$\$ (see figure). If the battery is connected to a resistance of value R, the maximum Joule heating in R will take place for :  JEE Main 2020 (Online) 3rd September Morning Slot](https://questions.examside.com/past-years/jee/question/model-a-torch-battery-of-length-l-to-be-made-up-of-a-th-jee-main-physics-current-electricity-d0grb6cevtw00sla)
[150 A potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected with a resistance ‘r’ and switch S (as shown in figure). With switch S open, the null position is obtained at a distance of 49 cm from Q. The potential gradient in the potentiometer wire is :  JEE Main 2020 (Online) 2nd September Evening Slot](https://questions.examside.com/past-years/jee/question/a-potentiometer-wire-pq-of-1-m-length-is-connected-to-a-stan-jee-main-physics-current-electricity-9iq2o4yiwzo2phz1)
[151 Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity \$\$\\rho \$\$C, \$\$\\rho \$\$T, \$\$\\rho \$\$M and \$\$\\rho \$\$A respectively. Then : JEE Main 2020 (Online) 2nd September Morning Slot](https://questions.examside.com/past-years/jee/question/consider-four-conducting-materials-copper-tungsten-mercury-jee-main-physics-current-electricity-ho41sgpoubcycmx9)
[152 In the given circuit diagram, a wire is joining points B and D. The current in this wire is :  JEE Main 2020 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-diagram-a-wire-is-joining-points-b-and-jee-main-physics-current-electricity-jzyvxldk2mzusdai)
[153 A galvanometer having a coil resistance 100 \$\$\\Omega \$\$ gives a full scale deflection when a current of 1 mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 10 V? JEE Main 2020 (Online) 8th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-having-a-coil-resistance-100-omega--give-jee-main-physics-current-electricity-dydykrta0map7ymc)
[154 The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA. For a cell of emf 5V and internal resistance of 20\$\$\\Omega \$\$, the null point on it is found to be a 1000 cm. The resistance of whole wire is : JEE Main 2020 (Online) 8th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-length-of-a-potentiometer-wire-is-1200-cm-and-it-carries-jee-main-physics-current-electricity-nfskqrhdleozvbuk)
[155 In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10 W and 2 heaters of 1 kW. The voltage of electric main is 220 V. The minimum fuse capacity (rated value) of the building will be : JEE Main 2020 (Online) 7th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-a-building-there-are-15-bulbs-of-45-w-15-bulbs-of-100-w-jee-main-physics-current-electricity-psz9ayi1hovm57ds)
[156 The current I1 (in A) flowing through 1 \$\$\\Omega \$\$ resistor in the following circuit is :  JEE Main 2020 (Online) 7th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-current-isub1sub-in-a-flowing-through-1-omega-jee-main-physics-current-electricity-qlqalcesxiyrkgf1)
[157 A moving coil galvanometer, having a resistance G, produces full scale deflection when a current Ig flows through it. This galvanometer can be converted into (i) an ammeter of range 0 to I0(I0 \> Ig) by connecting a shunt resistance RA to it and (ii) into a voltmeter of range 0 to V (V = GI0) by connecting a series resistance RV to it. Then, JEE Main 2019 (Online) 12th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-having-a-resistance-g-produces-jee-main-physics-electrostatics-a26lp2ocaroft3tp)
[158 The resistive network shown below is connected to a D.C. source of 16 V. The power consumed by the network is 4 Watt. The value of R is:  JEE Main 2019 (Online) 12th April Morning Slot](https://questions.examside.com/past-years/jee/question/the-resistive-network-shown-below-is-connected-to-a-dc-sou-jee-main-physics-current-electricity-n1ir8od7q7hkjqe1)
[159 A galvanometer of resistance 100 \$\$\\Omega \$\$ has 50 divisions on its scale and has sensitivitv of 20 \$\$\\mu \$\$A/division. It is to be converted to a voltmeter with three ranges of 0-2V, 0-10 V and 0-20 V. The appropriate circuit to do so is JEE Main 2019 (Online) 12th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-of-resistance-100-omega--has-50-division-jee-main-physics-current-electricity-uojkeeb761cnlltx)
[160 To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. The measured voltage is plotted as a function of the current, and the following graph is obtained :  If V0 is almost zero, identify the correct statement : JEE Main 2019 (Online) 12th April Morning Slot](https://questions.examside.com/past-years/jee/question/to-verify-ohms-law-a-student-connects-the-voltmeter-across-jee-main-physics-electrostatics-mipfflzns00uq1va)
[161 Space between two concentric conducting spheres of radii a and b (b \> a) is filled with a medium of resistivity \$\$\\rho \$\$. The resistance between the two spheres will be : JEE Main 2019 (Online) 10th April Evening Slot](https://questions.examside.com/past-years/jee/question/space-between-two-concentric-conducting-spheres-of-radii-a-a-jee-main-physics-electrostatics-ggnr6obtabzd9aqb)
[162 A current of 5 A passes through a copper conductor (resistivity = 1.7 × 10–8 \$\$\\Omega \$\$m) of radius of cross-section 5 mm. Find the mobility of the charges if their drift velocity is 1.1 × 10–3 m/s. JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-current-of-5-a-passes-through-a-copper-conductor-resistiv-jee-main-physics-units-and-measurements-ygnh5gypvgnk9ykk)
[163 In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure  SI. No. R(\$\$\\Omega \$\$) l(cm) 1. 1000 60 2. 100 13 3. 10 1.5 4. 1 1.0 Which of the readings is inconsistent? JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-the-circuit-diagram-and-the-co-jee-main-physics-units-and-measurements-zwqolmt4g0t9kdvw)
[164 In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown in the figure, it is a straight line. One may conclude that :  JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-an-experiment-the-resistance-of-a-material-is-plotted-as-jee-main-physics-units-and-measurements-mdpta08nnshlnsvd)
[165 A moving coil galvanometer allows a full scale current of 10–4 A. A series resistance of 2 M\$\$\\Omega \$\$ is required to convert the above galvanometer into a voltmeter of range 0-5 V. Therefore the value of shunt resistance required to convert the above galvanometer into an ammeter of range 0.10 mA is : JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-allows-a-full-scale-current-of-10-jee-main-physics-units-and-measurements-crry3oneft2zqdzo)
[166 In the given circuit, an ideal voltmeter connected across the 10\$\$\\Omega \$\$ resistance reads 2V. The internal resistance r, of each cell is:  JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-an-ideal-voltmeter-connected-across-th-jee-main-physics-units-and-measurements-lcc1qfpwcezp4jql)
[167 A metal wire of resistance 3 \$\$\\Omega \$\$ is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle 60° at the centre, the equivalent resistance between these two points will be :- JEE Main 2019 (Online) 9th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-metal-wire-of-resistance-3-omega-is-elongated-to-ma-jee-main-physics-units-and-measurements-gdcq17dn7lromrlx)
[168 The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resistance must be connected to it in order to convert it into an ammeter of range 0 – 0.5 A ? JEE Main 2019 (Online) 9th April Evening Slot](https://questions.examside.com/past-years/jee/question/the-resistance-of-a-galvanometer-is-50-ohm-and-the-maximum-c-jee-main-physics-units-and-measurements-tlix09kura2tzege)
[169 In a conductor, if the number of conduction electrons per unit volume is 8.5 × 1028 m–3 and mean free time is 25ƒs (femto second), it's approximate resistivity is :- (me = 9.1 × 10–31 kg) JEE Main 2019 (Online) 9th April Evening Slot](https://questions.examside.com/past-years/jee/question/in-a-conductor-if-the-number-of-conduction-electrons-per-un-jee-main-physics-units-and-measurements-qw0jo3vc5pu7ittq)
[170 A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is : (E is mid-point of arm CD)  JEE Main 2019 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-wire-of-resistance-r-is-bent-to-form-a-square-abcd-as-show-jee-main-physics-units-and-measurements-8rdybh20mc0qknut)
[171 A moving coil galvanometer has resistance 50\$\$\\Omega \$\$ and it indicates full deflection at 4mA current. A voltmeter is made using this galvanometer and a 5 k\$\$\\Omega \$\$ resistance. The maximum voltage, that can be measured using this voltmeter, will be close to : JEE Main 2019 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-has-resistance-50omega-and-jee-main-physics-units-and-measurements-llxdqgzllkyd0gyd)
[172 In the circuit shown, a four-wire potentiometer is made of a 400 cm long wire, which extends between A and B. The resistance per unit length of the potentiometer wire is r = 0.01 \$\$\\Omega \$\$/cm. If an ideal voltmeter is connected as shown with jockey J at 50 cm from end A, the expected reading of the voltmeter will be :-  JEE Main 2019 (Online) 8th April Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-circuit-shown-a-four-wire-potentiometer-is-made-of-a-jee-main-physics-units-and-measurements-l8vhvp28p60ikcqd)
[173 A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external resistance will be maximum when :- JEE Main 2019 (Online) 8th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-cell-of-internal-resistance-r-drives-current-through-an-ex-jee-main-physics-units-and-measurements-gjsdxxdfpcfzx16r)
[174 In the figure shown, what is the current (in Ampere) drawn from the battery ? You are given: R1 = 15\$\$\\Omega \$\$, R2 = 10 \$\$\\Omega \$\$, R3 = 20 \$\$\\Omega \$\$, R4 = 5\$\$\\Omega \$\$, R5 = 25\$\$\\Omega \$\$, R6 = 30 \$\$\\Omega \$\$, E = 15 V  JEE Main 2019 (Online) 8th April Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-figure-shown-what-is-the-current-in-ampere-drawn-f-jee-main-physics-units-and-measurements-bsj0kvjwe3tgvlfn)
[175 A 200 \$\$\\Omega \$\$ resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be : JEE Main 2019 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-registor-with-resistance-of-200-omega-has-one-of-its-jee-main-physics-current-electricity-bfmybps4cj7peejr)
[176 For the circuit shown, with R1 = 1.0W, R2 = 2.0 W, E1 = 2 V and E2 = E3 = 4 V, the potential difference between the points 'a' and 'b' is approximately (in V):  JEE Main 2019 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/for-the-circuit-shown-with-r1-10w-r2-20-w-e1-2-v-jee-main-physics-units-and-measurements-xy5kmmoeyxis4dyi)
[177 In the given circuit diagram, the currents, I1 = – 0.3 A, I4 = 0.8 A and I5 = 0.4 A, are flowing as shown. The currents I2, I3 and I6, respectively, are :  JEE Main 2019 (Online) 12th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-diagram-the-currents-i1-03-a-jee-main-physics-units-and-measurements-citnopsfgwa9qgpb)
[178 A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 \$\$ \\times \$\$ 10–4 A passes through it, its needle ( pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of : JEE Main 2019 (Online) 12th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-whose-resistance-is-50-ohm-has-25-divisions-jee-main-physics-units-and-measurements-yxlvvwpf1op7sxlt)
[179 In a meter bridge, the wire of length 1 m has a non-uniform cross-section such that, the variation \$\${{dR} \\over {d\\ell }}\$\$ of its resistance R with length \$\$\\ell \$\$ is \$\${{dR} \\over {d\\ell }}\$\$ \$\$ \\propto \$\$ \$\${1 \\over {\\sqrt \\ell }}\$\$. Two equal resistances are connected as shown in the figure. The galvanometer has zero deflection when the jockey is at point P. What is the length AP ?  JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-the-wire-of-length-1-m-has-a-non-uniform-jee-main-physics-units-and-measurements-awd4vlutsbnave6l)
[180 Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs draw powers P1 and P2 respectively, then : JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/two-electric-bulbs-rated-at-25-w-220-v-and-100-w-220-v-jee-main-physics-units-and-measurements-iyqrb3rsrqep7zix)
[181 The galvanometer deflection, when key K1 is closed but K2 is open, equals \$\$\\theta \$\$0 (see figure). On closing K2 also and adjusting R2 to 5\$\$\\Omega \$\$, the deflection in galvanometer becomes \$\${{{\\theta \_0}} \\over 5}.\$\$ . The resistance of the galvanometer is, then, given by \[Neglect the internal resistance of battery\] :  JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-galvanometer-deflection-when-key-k1-is-closed-but-k2-is-jee-main-physics-units-and-measurements-x8dhiz40rhmt1wby)
[182 An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m and esistance 5 \$\$\\Omega \$\$. The value of R, to give a potential difference of 5 mV across 10 cm of potentiometer wire, is : JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/an-ideal-battery-of-4-v-and-resistance-r-are-connected-in-se-jee-main-physics-units-and-measurements-obshbbyleb7decwp)
[183 A galvanometer having a resistance of 20 \$\$\\Omega \$\$ and 30 divisions on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter upto 15 volt, is: JEE Main 2019 (Online) 11th January Evening Slot](https://questions.examside.com/past-years/jee/question/galvanometer-having-a-resistance-of-20-omega-and-30-di-jee-main-physics-units-and-measurements-vrbxv1no4bmyacrx)
[184 In the circuit shown, the potential difference between A and B is :  JEE Main 2019 (Online) 11th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-circuit-shown-the-potential-difference-between-a-and-jee-main-physics-units-and-measurements-8a92y2riwxofmhvr)
[185 In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40 cm from A. If a 10 \$\$\\Omega \$\$ resistor is connected in series with R1, the null point shifts by 10 cm. The resistance that should be connected in parallel with (R1 + 10) \$\$\\Omega \$\$ such that the null point shifts back to its initial position is :  JEE Main 2019 (Online) 11th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-experimental-set-up-of-metre-bridge-shown-in-the-figu-jee-main-physics-units-and-measurements-qrqseivyyyldxwjr)
[186 Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be : JEE Main 2019 (Online) 11th January Morning Slot](https://questions.examside.com/past-years/jee/question/two-equal-resistances-when-connected-in-series-to-a-battery-jee-main-physics-units-and-measurements-bv8b5o8jnjwlw5ft)
[187 The resistance of the meter bridge AB in given figure is 4 \$\$\\Omega \$\$. With a cell of emf \$\$\\varepsilon \$\$ = 0.5 V and rheostat resistance Rh = 2 \$\$\\Omega \$\$ the null point is obtained at some point J. When the cell is replaced by another one of emf \$\$\\varepsilon \$\$ = \$\$\\varepsilon \$\$2 the same null point J is found for Rh = 6 \$\$\\Omega \$\$. The emf \$\$\\varepsilon \$\$2 is, :  JEE Main 2019 (Online) 11th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-resistance-of-the-meter-bridge-ab-in-given-figure-is-4-jee-main-physics-units-and-measurements-5hnmhue1bkjlh8c3)
[188 In a Wheatstone bridge(see fig.), Resistances P and Q are approximately equal. When R = 400 \$\$\\Omega \$\$, the bridge is balanced. On interchanging P and Q, the value of R, for balance, is 405 \$\$\\Omega \$\$. The value of X is close to :  JEE Main 2019 (Online) 11th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-wheatstone-bridgesee-fig-resistances-p-and-q-are-ap-jee-main-physics-units-and-measurements-bhwhojkwbsjgoggt)
[189 A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is - JEE Main 2019 (Online) 10th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-current-of-2-ma-was-passed-through-an-unknown-resistor-whi-jee-main-physics-units-and-measurements-nhbw2viowas8fkvx)
[190 The actual value of resistance R, shown in the figure is 30\$\$\\Omega \$\$. This is measuered in an experiment as shown using the standard formula R = \$\${V \\over {\\rm I}}\$\$, where V and I are the readings of the voltmeter and ammeter, respectively. If the measured value of R is 5% less, then the internal resistance of the voltmeter is -  JEE Main 2019 (Online) 10th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-actual-value-of-resistance-r-shown-in-the-figure-is-30-jee-main-physics-units-and-measurements-oot4jcsxprg7krcy)
[191 The Wheatstone bridge shown in figure, here, gets balanced when the carbon resistor used as R1 has the colour code (Orange, Red, Brown). The resistors R2 and R4 are 80\$\$\\Omega \$\$ and 40\$\$\\Omega \$\$, respectively. Assuming that the colour code for the carbon resistors gives their accurate values, the colour code for the carbon resistor, used as R3, would be -  JEE Main 2019 (Online) 10th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-wheatstone-bridge-shown-in-figure-here-gets-balanced-w-jee-main-physics-units-and-measurements-w1bzgtrind1lcvkb)
[192 A uniform metallic wire has a resistance of 18 \$\$\\Omega \$\$ and is bent into an equilateral triangle. Then, the resistance between any two vertices of the triangle is - JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/a-uniform-metallic-wire-has-a-resistance-of-18-omega-a-jee-main-physics-units-and-measurements-ks6kk3srfzoahruv)
[193 A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be passed through this resistor is - JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/a-2-w-carbon-resistor-is-color-coded-with-green-black-red-jee-main-physics-units-and-measurements-ff4cx9zjcwuiramw)
[194 In the given circuit the cells have zero internal resistance. The currents (in Amperes) passing through resistance R1 and R2 respectively, are -  JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-the-cells-have-zero-internal-resistance-jee-main-physics-units-and-measurements-yc59bwt197fa4lqt)
[195 A potentiometer wire AB having length L and resistance 12 r is joined to a cell D of emf \$\$\\varepsilon \$\$ and internal resistance r. A cell C having emf \$\$\\varepsilon \$\$/2 and internal resistance 3r is connected. The length AJ at which the galvanometer as shown in figure shows no deflection is –  JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/a-potentiometer-wire-ab-having-length-l-and-resistance-12-r-jee-main-physics-units-and-measurements-tvywjwdwnktcbjen)
[196 A carbon resistance has a following colour code. What is the value of the resistance ?  JEE Main 2019 (Online) 9th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-carbon-resistance-has-a-following-colour-code-what-is-the-jee-main-physics-units-and-measurements-uypbhp7zspdrsroi)
[197 In the given circuit the the internal resistance of the 18 V cell is negligible. If R1 = 400 \$\$\\Omega \$\$, R3 = 100 \$\$\\Omega \$\$ and R4 = 500 \$\$\\Omega \$\$ and the reading of an ideal voltmeter across R4 is 5V, then the value of R2 will be :  JEE Main 2019 (Online) 9th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-the-the-internal-resistance-of-the-18-v-jee-main-physics-units-and-measurements-u2wtsk4lw4lwfxjb)
[198 When the switch S, in the circuit shown, is closed, then the value of current i will be :  JEE Main 2019 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-determine-the-value-of-i-jee-main-physics-units-and-measurements-izcykdjlk1wa36su)
[199 A resistance is shown in the figure. Its value and tolerance are given respectively by :  JEE Main 2019 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/four-colour-band-resistor-with-colours-of-band-is-given-in-f-jee-main-physics-units-and-measurements-ybvzsryfh5kap7ao)
[200 Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2, is \$\$\\upsilon \$\$. If the electron density in copper is 9 \$\$ \\times \$\$ 1028/m3 the value of \$\$\\upsilon \$\$. in mm/s is close to (Take charge of electron to be = 1.6 \$\$ \\times \$\$ 10\$\$-\$\$19C) JEE Main 2019 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/there-is-a-current-of-1344-amp-in-a-copper-wire-whose-area-jee-main-physics-units-and-measurements-kmfumhe9pfvi9tyx)
[201 A galvanometer with its coil resistance 25 \$\$\\Omega \$\$ requires a current of 1 mA for its full deflection. In order to construct an ammeter to read upto a current of 2 A, the approximate value of the shunt resistance should be : JEE Main 2018 (Online) 16th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-with-its-coil-resistance-25-omega-requi-jee-main-physics-units-and-measurements-2xgmthurbig0kqbl)
[202 A heating element has a resistance of 100 \$\$\\Omega \$\$ at room temperature. When it is connected to a supply of 220 V, a steady current of 2 A passes in it and temperature is 500oC more than room temperature. what is the temperature coefficient of resistance of the heating element ? JEE Main 2018 (Online) 16th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-heating-element-has-a-resistance-of-100-omega-at-roo-jee-main-physics-units-and-measurements-ywfaiacdhb7aaob0)
[203 In a circuit for finding the resistance of a galvanometer by half deflection method, a 6 V battery and a high resistance of 11 k\$\$\\Omega \$\$ are used. The figure of merit of the galvanometer is 60 \$\$\\mu A/\$\$division. In the absence of shunt resistance, the galvanometer produces a deflection of \$\$\\theta \$\$ = 9 divisions when current flows in the circuit. The value of the shunt resistance that can cause the deflection of \$\$\\theta /2,\$\$ is closest to : JEE Main 2018 (Online) 16th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-circuit-for-finding-the-resistance-of-a-galvanometer-b-jee-main-physics-units-and-measurements-vzipwgizqe5coo26)
[204 On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of their series combination is 1 k\$\$\\Omega \$\$. How much was the resistance on the left slot before interchanging the resistances? JEE Main 2018 (Offline)](https://questions.examside.com/past-years/jee/question/on-interchanging-the-resistances-the-balance-point-of-a-met-2018-marks-4-hcig5kv9z1xl432i.htm)
[205 Two batteries with e.m.f 12 V and 13 V are connected in parallel across a load resistor of 10 \$\$\\Omega \$\$. The internal resistances of the two batteries are 1 \$\$\\Omega \$\$ and 2 \$\$\\Omega \$\$ respectively. The voltage across the load lies between : JEE Main 2018 (Offline)](https://questions.examside.com/past-years/jee/question/two-batteries-with-emf-12-v-and-13-v-are-connected-in-para-2018-marks-4-5nhevsoisfvxpiku.htm)
[206 In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by a resistance of 5 \$\$\\Omega\$\$, a balance is found when the cell is connected across 40 cm of the wire. Find the internal resistance of the cell. JEE Main 2018 (Offline)](https://questions.examside.com/past-years/jee/question/in-a-potentiometer-experiment-it-is-found-that-no-current-p-2018-marks-4-r9udgikcd5ckm2yu.htm)
[207 A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge density of the rod is \$\$\\rho \$\$, how long will the changes take to travel a distance d ? JEE Main 2018 (Online) 15th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-copper-rod-of-cross-sectional-area-a-carries-a-uniform-cur-jee-main-physics-units-and-measurements-qrkvzrbrepub7u07)
[208 A constant voltages is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be : JEE Main 2018 (Online) 15th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-constant-voltages-is-applied-between-two-ends-of-a-metalli-jee-main-physics-units-and-measurements-emdycc8k0mysz6ea)
[209  In a meter bridge, as shown in the figure, it is given that resistance \$\$Y = 12.5\\,\\,\\Omega \$\$ and that the balance is obtained at a distance \$\$39.5\$\$ \$\$cm\$\$ from end \$\$A\$\$ (by Jockey J). After interchanging the resistances \$\$X\$\$ and \$\$Y\$\$, a new balance point is found at a distance \$\${l\_2}\$\$ from end \$\$A.\$\$ What are the value of \$\$X\$\$ and \$\${l\_2}\$\$ ? JEE Main 2018 (Online) 15th April Morning Slot](https://questions.examside.com/past-years/jee/question/-in-a-meter-bridge-as-shown-in-the-figure-it-is-given-tha-jee-main-physics-units-and-measurements-5mpkvahgzog2n8lt)
[210 In the given circuit all resistances are of value \$\$R\$\$ \$\$ohm\$\$ each. The equivalent resistance between \$\$A\$\$ and \$\$B\$\$ is :  JEE Main 2018 (Online) 15th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-all-resistances-are-of-value-r-oh-jee-main-physics-units-and-measurements-m7leau3hpapfqbqq)
[211 The figure shows three circuits I, II and III which are connected to a 3V battery. If the powers dissipated by the configurations I, II and III are P1 , P2 and P3 respectively, then :  JEE Main 2017 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/the-figure-shows-three-circuits-i-ii-and-iii-which-are-conn-jee-main-physics-units-and-measurements-blrokt9eeaiu5etn)
[212 In a meter bridge experiment resistances are connected as shown in the figure. Initially resistance P = 4 \$\$\\Omega \$\$ and the neutral point N is at 60 cm from A. Now an unknown resistance R is connected in series to P and the new position of the neutral point is at 80 cm from A. The value of unknown resistance R is :  JEE Main 2017 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-resistances-are-connected-as-sh-jee-main-physics-units-and-measurements-vkjwe7i7ozn49zi5)
[213 A uniform wire of length 1 and radius r has a resistance of 100 \$\$\\Omega \$\$. It is recast into a wire of radius \$\${r \\over 2}.\$\$ The resistance of new wire will be : JEE Main 2017 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-uniformwire-of-length-1-and-radius-r-has-a-resistae-of-100-jee-main-physics-units-and-measurements-be1x2mry1ld8xwnh)
[214  A 9 V battery with internal resistance of 0.5 \$\$\\Omega \$\$ is connected across an infinite network as shown in the figure. All ammeters A1, A2, 3 and voltmeter V are ideal. Choose correct statement. JEE Main 2017 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/-a-9-v-battery-with-internal-resistance-of-05-omega-jee-main-physics-units-and-measurements-hgpsuyeqixxdqn5y)
[215 A potentiometer PQ is set up to compare two resistances as shown in the figure. The ammeter A in the circuit reads 1.0 A when two way key K3 is open. The balance point is at a length \$\$\\ell \$\$1 cm from P when two way key K3 is plugged in between 2 and 1, while the balance point is at a length \$\$\\ell \$\$2 cm from P when key K3 is plugged in between 3 and 1. The ratio of two resistances \$\${{{R\_1}} \\over {{R\_2}}}\$\$, is found to be :  JEE Main 2017 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-potentiometer-pq-is-set-up-to-compare-two-resistances-as-s-jee-main-physics-units-and-measurements-x2fxwcwrbr9q2ulw)
[216 Which of the following statements is **false**? JEE Main 2017 (Offline)](https://questions.examside.com/past-years/jee/question/which-of-the-following-statements-is-false-2017-marks-4-acmtzs0l84nu9o5z.htm)
[217  In the given circuit, the current in each resistance is: JEE Main 2017 (Offline)](https://questions.examside.com/past-years/jee/question/-in-the-given-circuit-the-current-in-each-resistance-is-2017-marks-4-q6enrjemho3wyldd.htm)
[218 When a current of 5 mA is passed through a galvanometer having a coil of resistance 15\$\$\\Omega \$\$, it shows full scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range 0 – 10V is: JEE Main 2017 (Offline)](https://questions.examside.com/past-years/jee/question/when-a-current-of-5-ma-is-passed-through-a-galvanometer-havi-2017-marks-4-5at5yjbihnidc8j8.htm)
[219 A galvanometer has a 50 division scale. Battery has no internal resistance. It is found that there is deflection of 40 divisions when R = 2400 \$\$\\Omega \$\$. Deflection becomes 20 divisions when resistance taken from resistance box is 4900 \$\$\\Omega \$\$. Then we can conclude :  JEE Main 2016 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-has-a-50-division-scale-battery-has-no-inter-jee-main-physics-units-and-measurements-jrk59ujxsdklusro)
[220 The resistance of an electrical toaster has a temperature dependence given by R(T) = R0 \[1 + \$\$\\alpha \$\$(T − T0)\] in its range of operation. At T0 = 300 K, R = 100 \$\$\\Omega \$\$ and at T = 500 K, R = 120 \$\$\\Omega \$\$. The toaster is connected to a voltage source at 200 V and its temperature is raised at a constant rate from 300 to 500 K in 30 s. The total work done in raising the temperature is : JEE Main 2016 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/the-resistance-of-an-electrical-toaster-has-a-temperature-de-jee-main-physics-units-and-measurements-gdlbri2iyi4nxtc8)
[221  In the circuit shown, the resistance r is a variable resistance. If for r = *fR,* the heat generation in r is maximum then the value of *f* is : JEE Main 2016 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/-in-the-circuit-shown-the-resistance-r-is-a-variable-resist-jee-main-physics-units-and-measurements-hquvp1wne8xzk1dq)
[222 A 50 \$\$\\Omega \$\$ resistance is connected to a battery of 5 V. A galvanometer of resistance 100 \$\$\\Omega \$\$ is to be used as an ammeter to measure current through the resistance, for this a resistance rs is connected to the galvanometer. Which of the following connections should be employed if the measured current is within 1% of thecurrent without the ammeter in the circuit ? JEE Main 2016 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-50-omega-resistance-is-connected-to-a-battery-of-5-v-jee-main-physics-units-and-measurements-e109uidj20gy3ns3)
[223 A galvanometer having a coil resistance of \$\$100\\,\\Omega \$\$ gives a full scale deflection, when a currect of \$\$1\$\$ \$\$mA\$\$ is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of \$\$10\$\$ \$\$A,\$\$ is : JEE Main 2016 (Offline)](https://questions.examside.com/past-years/jee/question/a-galvanometer-having-a-coil-resistance-of-100omega-2016-marks-4-ojakst2xymzyer9p.htm)
[224  In the circuit shown, the current in the \$\$1\\Omega \$\$ resistor is : JEE Main 2015 (Offline)](https://questions.examside.com/past-years/jee/question/in-the-circuit-shown-the-current-in-the-1omega-resist-2015-marks-4-fyvsrq9yd8yfaqjo.htm)
[225 When \$\$5V\$\$ potential difference is applied across a wire of length \$\$0.1\$\$ \$\$m,\$\$ the drift speed of electrons is \$\$2.5 \\times {10^{ - 4}}\\,\\,m{s^{ - 1}}.\$\$ If the electron density in the wire is \$\$8 \\times {10^{28}}\\,\\,{m^{ - 3}},\$\$ the resistivity of the material is close to : JEE Main 2015 (Offline)](https://questions.examside.com/past-years/jee/question/when-5v-potential-difference-is-applied-across-a-wire-of-2015-marks-4-gwzftrio0loijl7b.htm)
[226 In a large building, three are \$\$15\$\$ bulbs of \$\$40\$\$ \$\$W\$\$, \$\$5\$\$ bulbs of \$\$100\$\$ \$\$W\$\$, \$\$5\$\$ fans of \$\$80\$\$ \$\$W\$\$ and \$\$1\$\$ heater of \$\$1\$\$ \$\$kW.\$\$ The voltage of electric mains is \$\$220\$\$ \$\$V.\$\$ The minimum capacity of the main fuse of the building will be: JEE Main 2014 (Offline)](https://questions.examside.com/past-years/jee/question/in-a-large-building-three-are-15-bulbs-of-40-w-2014-marks-4-lklwnuispso9zkmh.htm)
[227 The supply voltage to room is \$\$120V.\$\$ The resistance of the lead wires is \$\$6\\Omega \$\$. A \$\$60\$\$ \$\$W\$\$ bulb is already switched on. What is the decrease of voltage across the bulb, when a \$\$240\$\$ \$\$W\$\$ heater is switched on in parallel to the bulb? JEE Main 2013 (Offline)](https://questions.examside.com/past-years/jee/question/the-supply-voltage-to-room-is-120v-the-resistance-of-th-2013-marks-4-zz73qo0xacyd5g1n.htm)
[228 This questions has Statement - \$\${\\rm I}\$\$ and Statement - \$\${\\rm I}\$\$\$\${\\rm I}\$\$. Of the four choices given after the Statements, choose the one that best describes into two Statements. **Statement - \$\${\\rm I}\$\$ :** Higher the range, greater is the resistance of ammeter. **Statement - \$\${\\rm I}\$\$\$\${\\rm I}\$\$ :** To increase the range of ammeter, additional shunt needs to be used across it. JEE Main 2013 (Offline)](https://questions.examside.com/past-years/jee/question/this-questions-has-statement-rm-i-and-statement-2013-marks-4-emacvdckcjfexpvy.htm)
[229 Two electric bulbs marked \$\$25W\$\$ \$\$-\$\$ \$\$220\$\$ \$\$V\$\$ and \$\$100W\$\$ \$\$-\$\$ \$\$220V\$\$ are connected in series to a \$\$440\$\$ \$\$V\$\$ supply. Which of the bulbs will fuse? AIEEE 2012](https://questions.examside.com/past-years/jee/question/two-electric-bulbs-marked-25w-220-v-and-2012-marks-4-q1gsthhcgtcd6pu7.htm)
[230 If a wire is stretched to make it \$\$0.1\\% \$\$ longer, its resistance will: AIEEE 2011](https://questions.examside.com/past-years/jee/question/if-a-wire-is-stretched-to-make-it-01-longer-its-res-2011-marks-4-a2nhsle1cqc2bd2t.htm)
[231 Two conductors have the same resistance at \$\${0^ \\circ }C\$\$ but their temperature coefficients of resistance are \$\${\\alpha \_1}\$\$ and \$\${\\alpha \_2}.\$\$ The respective temperature coefficients of their series and parallel combinations are nearly AIEEE 2010](https://questions.examside.com/past-years/jee/question/two-conductors-have-the-same-resistance-at-0-circ-c-2010-marks-4-d64yiqxouc6xmxcw.htm)
[232 Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.  The value of the unknown resister \$\$R\$\$ is AIEEE 2008](https://questions.examside.com/past-years/jee/question/shown-in-the-figure-below-is-a-meter-bridge-set-up-with-null-2008-marks-4-ztgsr6loh3y9b6b4.htm)
[233 Consider a block of conducting material of resistivity \$\$'\\rho '\$\$ shown in the figure. Current \$\$'I'\$\$ enters at \$\$'A'\$\$ and leaves from \$\$'D'\$\$. We apply superposition principle to find voltage \$\$'\\Delta V'\$\$ developed between \$\$'B'\$\$ and \$\$'C'\$\$. The calculation is done in the following steps: (i) Take current \$\$'I'\$\$ entering from \$\$'A'\$\$ and assume it to spread over a hemispherical surface in the block. (ii) Calculate field \$\$E(r)\$\$ at distance \$\$'r'\$\$ from A by using Ohm's law \$\$E = \\rho j,\$\$ where \$\$j\$\$ is the current per unit area at \$\$'r'\$\$. (iii) From the \$\$'r'\$\$ dependence of \$\$E(r)\$\$, obtain the potential \$\$V(r)\$\$ at \$\$r\$\$. (iv) Repeat (i), (ii) and (iii) for current \$\$'I'\$\$ leaving \$\$'D'\$\$ and superpose results for \$\$'A'\$\$ and \$\$'D'.\$\$  For current entering at \$\$A,\$\$ the electric field at a distance \$\$'r'\$\$ from \$\$A\$\$ is AIEEE 2008](https://questions.examside.com/past-years/jee/question/consider-a-block-of-conducting-material-of-resistivity-r-2008-marks-4-qkfzxkk4ntqmjuop.htm)
[234 Consider a block of conducting material of resistivity \$\$'\\rho '\$\$ shown in the figure. Current \$\$'I'\$\$ enters at \$\$'A'\$\$ and leaves from \$\$'D'\$\$. We apply superposition principle to find voltage \$\$'\\Delta V'\$\$ developed between \$\$'B'\$\$ and \$\$'C'\$\$. The calculation is done in the following steps: (i) Take current \$\$'I'\$\$ entering from \$\$'A'\$\$ and assume it to spread over a hemispherical surface in the block. (ii) Calculate field \$\$E(r)\$\$ at distance \$\$'r'\$\$ from A by using Ohm's law \$\$E = \\rho j,\$\$ where \$\$j\$\$ is the current per unit area at \$\$'r'\$\$. (iii) From the \$\$'r'\$\$ dependence of \$\$E(r)\$\$, obtain the potential \$\$V(r)\$\$ at \$\$r\$\$. (iv) Repeat (i), (ii) and (iii) for current \$\$'I'\$\$ leaving \$\$'D'\$\$ and superpose results for \$\$'A'\$\$ and \$\$'D'.\$\$  \$\$\\Delta V\$\$ measured between \$\$B\$\$ and \$\$C\$\$ is AIEEE 2008](https://questions.examside.com/past-years/jee/question/consider-a-block-of-conducting-material-of-resistivity-r-2008-marks-4-lzrfiw1ifbldnudx.htm)
[235 A \$\$5V\$\$ battery with internal resistance \$\$2\\Omega \$\$ and a \$\$2V\$\$ battery with internal resistance \$\$1\\Omega \$\$ are connected to a \$\$10\\Omega \$\$ resistor as shown in the figure.  The current in the \$\$10\\Omega \$\$ resistor is AIEEE 2008](https://questions.examside.com/past-years/jee/question/a-5v-battery-with-internal-resistance-2omega-and-a-2008-marks-4-wtmnsn9u9rwtubzg.htm)
[236 The resistance of a wire is \$\$5\$\$ ohm at \$\${50^ \\circ }C\$\$ and \$\$6\$\$ ohm at \$\${100^ \\circ }C.\$\$ The resistance of the wire at \$\${0^ \\circ }C\$\$ will be AIEEE 2007](https://questions.examside.com/past-years/jee/question/the-resistance-of-a-wire-is-5-ohm-at-50-circ-c-a-2007-marks-4-vbqtk6o2o9uz2mna.htm)
[237 A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will AIEEE 2006](https://questions.examside.com/past-years/jee/question/a-thermocouple-is-made-from-two-metals-antimony-and-bismuth-2006-marks-4-goyckb1pbfgv1tyk.htm)
[238 An electric bulb is rated \$\$220\$\$ volt - \$\$100\$\$ watt. The power consumed by it when operated on \$\$110\$\$ volt will be AIEEE 2006](https://questions.examside.com/past-years/jee/question/an-electric-bulb-is-rated-220-volt-100-watt-the-p-2006-marks-4-leik1aar1ed4jksx.htm)
[239 In a Wheatstone's bridge, three resistance \$\$P, Q\$\$ and \$\$R\$\$ connected in the three arms and the fourth arm is formed by two resistances \$\${S\_1}\$\$ and \$\${S\_2}\$\$ connected in parallel. The condition for the bridge to be balanced will be AIEEE 2006](https://questions.examside.com/past-years/jee/question/in-a-wheatstones-bridge-three-resistance-p-q-and-r-2006-marks-4-97iugmaetuoty92u.htm)
[240 The resistance of bulb filmanet is \$\$100\\Omega \$\$ at a temperature of \$\${100^ \\circ }C.\$\$ If its temperature coefficient of resistance be \$\$0.005\$\$ per \$\$^ \\circ C\$\$, its resistance will become \$\$200\\,\\Omega \$\$ at a temperature of AIEEE 2006](https://questions.examside.com/past-years/jee/question/the-resistance-of-bulb-filmanet-is-100omega-at-a-tempe-2006-marks-4-edjbnrfk51eripfm.htm)
[241 The current \$\${\\rm I}\$\$ drawn from the \$\$5\$\$ volt source will be  AIEEE 2006](https://questions.examside.com/past-years/jee/question/the-current-rm-i-drawn-from-the-5-volt-source-wil-2006-marks-4-z3fhlkp1hy20sqg8.htm)
[242 Two sources of equal \$\$emf\$\$ are connected to an external resistance \$\$R.\$\$ The internal resistance of the two sources are \$\${R\_1}\$\$ and \$\${R\_2}\\left( {{R\_1} \> {R\_1}} \\right).\$\$ If the potential difference across the source having internal resistance \$\${R\_2}\$\$ is zero, then AIEEE 2005](https://questions.examside.com/past-years/jee/question/two-sources-of-equal-emf-are-connected-to-an-external-re-2005-marks-4-kzl0wvkqcmamh0ey.htm)
[243 An energy source will supply a constant current into the load if its internal resistance is AIEEE 2005](https://questions.examside.com/past-years/jee/question/an-energy-source-will-supply-a-constant-current-into-the-loa-2005-marks-4-v2uyxyjy4iwpwxsq.htm)
[244 In a potentiometer experiment the balancing with a cell is at length \$\$240\$\$ \$\$cm.\$\$ On shunting the cell with a resistance of \$\$2\\Omega ,\$\$ the balancing length becomes \$\$120\$\$ \$\$cm\$\$. The internal resistance of the cell is AIEEE 2005](https://questions.examside.com/past-years/jee/question/in-a-potentiometer-experiment-the-balancing-with-a-cell-is-a-2005-marks-4-v6wcr5zbuwy1dmje.htm)
[245 The resistance of hot tungsten filament is about \$\$10\$\$ times the cold resistance. What will be resistance of \$\$100\$\$ \$\$W\$\$ and \$\$200\$\$ \$\$V\$\$ lamp when not in use ? AIEEE 2005](https://questions.examside.com/past-years/jee/question/the-resistance-of-hot-tungsten-filament-is-about-10-time-2005-marks-4-zihpahp6kbyelwtc.htm)
[246 A moving coil galvanometer has \$\$150\$\$ equal divisions. Its current sensitivity is \$\$10\$\$- divisions per milliampere and voltage sensitivity is \$\$2\$\$ divisions per millivolt. In order that each division reads \$\$1\$\$ volt, the resistance in \$\$ohms\$\$ needed to be connected in series with the coil will be - AIEEE 2005](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-has-150-equal-divisions-its-2005-marks-4-cpzym95vlwxghtmx.htm)
[247 Two voltmeters, one of copper and another of silver, are joined in parallel. When a total charge \$\$q\$\$ flows through the voltmeters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are \$\${Z\_1}\$\$ and \$\${Z\_2}\$\$ respectively the charge which flows through the silver voltmeter is AIEEE 2005](https://questions.examside.com/past-years/jee/question/two-voltmeters-one-of-copper-and-another-of-silver-are-joi-2005-marks-4-6soja5xiwlmklyvq.htm)
[248 In the circuit, the galvanometer \$\$G\$\$ shows zero deflection. If the batteries \$\$A\$\$ and \$\$B\$\$ have negligible internal resistance, the value of the resistor \$\$R\$\$ will be -  AIEEE 2005](https://questions.examside.com/past-years/jee/question/in-the-circuit-the-galvanometer-g-shows-zero-deflection-2005-marks-4-vhzhazm0gnuamlrg.htm)
[249 A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be AIEEE 2005](https://questions.examside.com/past-years/jee/question/a-heater-coil-is-cut-into-two-equal-parts-and-only-one-part-2005-marks-4-ts1rmmmalhvw3bqi.htm)
[250 The resistance of the series combination of two resistances is \$\$S.\$\$ When they are jointed in parallel the total resistance is \$\$P.\$\$ If \$\$S = nP\$\$ then the Minimum possible value of \$\$n\$\$ is AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-resistance-of-the-series-combination-of-two-resistances-2004-marks-4-wr8hjdc3se066k06.htm)
[251 An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii are in the ratio of \$\${4 \\over 3}\$\$ and \$\${2 \\over 3}\$\$, then the ratio of the current passing through the wires will be AIEEE 2004](https://questions.examside.com/past-years/jee/question/an-electric-current-is-passed-through-a-circuit-containing-t-2004-marks-4-bjq6wond4uoiakoa.htm)
[252 The total current supplied to the circuit by the battery is  AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-total-current-supplied-to-the-circuit-by-the-battery-is-2004-marks-4-wqpxflq3svqh5pjv.htm)
[253 In a meter bridge experiment null point is obtained at \$\$20\$\$ \$\$cm\$\$, from one end of the wire when resistance \$\$X\$\$ is balanced against another resistance \$\$Y.\$\$ If \$\$X \< Y\$\$, then where will be the new position of the null point from the same end, if one decides to balance a resistance of \$\$4\$\$ \$\$X\$\$ against \$\$Y\$\$ AIEEE 2004](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-null-point-is-obtained-at-20-2004-marks-4-emccdeyaxjpf8mlv.htm)
[254 Thermistors are usually made of AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-termistors-are-usually-made-of-2004-marks-4-wb8x5uhfdglimhec.htm)
[255 The electrochemical equivalent of a metal is \$\${3.35109^{ - 7}}\$\$ \$\$kg\$\$ per Coulomb. The mass of the metal liberated at the cathode when a \$\$3A\$\$ current is passed for \$\$2\$\$ seconds will be AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-electrochemical-equivalent-of-a-metal-is-335109-2004-marks-4-n45thvolm0ipejtq.htm)
[256 The thermo \$\$emf\$\$ of a thermocouple varies with temperature \$\$\\theta \$\$ of the hot junction as \$\$E = a\\theta + b{\\theta ^2}\$\$ in volts where the ratio \$\$a/b\$\$ is \$\${700^ \\circ }C.\$\$ If the cold junction is kept at \$\${0^ \\circ }C,\$\$ then the neutral temperature is AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-thermo-emf-of-a-thermocouple-varies-with-temperature-2004-marks-4-plnk8ufkilceltwx.htm)
[257 A material \$\$'B'\$\$ has twice the specific resistance of \$\$'A'.\$\$ A circular wire made of \$\$'B'\$\$ has twice the diameter of a wire made of \$\$'A'\$\$. Then for the two wires to have the same resistance, the ratio \$\${l \\over B}/{l \\over A}\$\$ of their respective lengths must be AIEEE 2004](https://questions.examside.com/past-years/jee/question/a-material-b-has-twice-the-specific-resistance-of-a-2004-marks-4-w0yp4gh8gzh7pfgv.htm)
[258 The Kirchhoff's first law \$\$\\left( {\\sum i = 0} \\right)\$\$ and second law \$\$\\left( {\\sum iR = \\sum E} \\right),\$\$ where the symbols have their usual meanings, are respectively based on AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-kirchhoffs-first-law-left-sum-i-0-right-an-2004-marks-4-gespm7i5jjpctjzq.htm)
[259 The length of a given cylindrical wire is increased by \$\$100\\% \$\$. Due to the consequent decrease in diameter the change in the resistance of the wire will be AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-length-of-a-given-cylindrical-wire-is-increased-by-100-2003-marks-4-txwenjjwxkpjkag4.htm)
[260 A \$\$220\$\$ volt, \$\$1000\$\$ watt bulb is connected across a \$\$110\$\$ \$\$volt\$\$ mains supply. The power consumed will be AIEEE 2003](https://questions.examside.com/past-years/jee/question/a-220-volt-1000-watt-bulb-is-connected-across-a-1-2003-marks-4-cy7fsxiy2upkikqw.htm)
[261 A \$\$3\$\$ volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current \$\${\\rm I}\$\$, in the circuit will be  AIEEE 2003](https://questions.examside.com/past-years/jee/question/a-3-volt-battery-with-negligible-internal-resistance-is-2003-marks-4-bk5sv78j3l0z0crc.htm)
[262 The nagative \$\$Zn\$\$ pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by \$\$0.13g\$\$ in \$\$30\$\$ minutes. If the electrochemical equivalent of \$\$Zn\$\$ and \$\$Cu\$\$ are \$\$32.5\$\$ and \$\$31.5\$\$ respectively, the increase in the mass of the positive \$\$Cu\$\$ pole in this time is AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-nagative-zn-pole-of-a-daniell-cell-sending-a-consta-2003-marks-4-oc1wl3icwlwoyzf3.htm)
[263 The thermo \$\$e.m.f.\$\$ of a thermo -couple is \$\$25\$\$ \$\$\\mu V/{}^ \\circ C\$\$ at room temperature. A galvanometer of \$\$40\$\$ \$\$ohm\$\$ resistance, capable of detecting current as low as \$\${10^{ - 5}}\\,A,\$\$ is connected with the thermo couple. The smallest temperature difference that can be detected by this system is AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-thermo-emf-of-a-thermo-couple-is-25-mu-v-2003-marks-4-ocfpjgdx87zk9nbi.htm)
[264 The length of a wire of a potentiometer is \$\$100\$\$ \$\$cm\$\$, and the \$\$e.\$\$ \$\$m.\$\$ \$\$f.\$\$ of its standard cell is \$\$E\$\$ volt. It is employed to measure the \$\$e.m.f.\$\$ of a battery whose internal resistance in \$\$0.5\\Omega .\$\$ If the balance point is obtained at \$\$1=30\$\$ \$\$cm\$\$ from the positive end, the \$\$e.m.f.\$\$ of the battery is where \$\$i\$\$ is the current in the potentiometer wire. AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-length-of-a-wire-of-a-potentiometer-is-100-cm-a-2003-marks-4-mre8l33bfkyzgwbw.htm)
[265 An ammeter reads upto \$\$1\$\$ ampere. Its internal resistance is \$\$0.81\$\$ \$\$ohm\$\$. To increase the range to \$\$10\$\$ \$\$A\$\$ the value of the required shunt is AIEEE 2003](https://questions.examside.com/past-years/jee/question/an-ammeter-reads-upto-1-ampere-its-internal-resistance-2003-marks-4-uq9zqy6wgfx7ctg0.htm)
[266 If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a AIEEE 2002](https://questions.examside.com/past-years/jee/question/if-an-ammeter-is-to-be-used-in-place-of-a-voltmeter-then-we-2002-marks-4-uilfmxxbpdgge81u.htm)
[267 A wire when connected to \$\$220\$\$ \$\$V\$\$ mains supply has power dissipation \$\${P\_1}.\$\$ Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is \$\${P\_2}.\$\$ Then \$\${P\_2}:{P\_1}\$\$ is AIEEE 2002](https://questions.examside.com/past-years/jee/question/a-wire-when-connected-to-220-v-mains-supply-has-powe-2002-marks-4-5m7eroc16wzrtcrz.htm)
[268 If \$\${\\theta \_1},\$\$ is the inversion temperature, \$\${\\theta \_n}\$\$ is the neutral temperature, \$\${\\theta \_c}\$\$ is the temperature of the cold junction, then AIEEE 2002](https://questions.examside.com/past-years/jee/question/if-theta-1-is-the-inversion-temperature-theta-2002-marks-4-b6jootyk7cfkebol.htm)
[269 The mass of product liberated on anode in an electrochemical cell depends on (where \$\$t\$\$ is the time period for which the current is passed). AIEEE 2002](https://questions.examside.com/past-years/jee/question/the-mass-of-product-liberated-on-anode-in-an-electrochemical-2002-marks-4-ggjquvwuc1dldp3s.htm)
[270 If in the circuit, power dissipation is \$\$150W,\$\$ then \$\$R\$\$ is  AIEEE 2002](https://questions.examside.com/past-years/jee/question/if-in-the-circuit-power-dissipation-is-150w-then-r-2002-marks-4-ae3baf5clpjfkbta.htm)
## Numerical
[1 The equivalent resistance between the points \$A\$ and \$B\$ in the following circuit is \$\\frac{x}{5} \\Omega\$. The value of \$x\$ is \$\\\_\\\_\\\_\\\_\$ .  JEE Main 2026 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-the-points-a-and-b-jee-main-physics-units-and-measurements-ajmrixszs7mmpzyt)
[2 In a meter bridge experiment to determine the value of unknown resistance, first the resistances \$2 \\Omega\$ and \$3 \\Omega\$ are connected in the left and right gaps of the bridge and the null point is obtained at a distance \$l \\mathrm{~cm}\$ from the left. Now when an unknown resistance \$x \\Omega\$ is connected in parallel to \$3 \\Omega\$ resistance, the null point is shifted by 10 cm to the right of wire. The value of unknown resistance \$x\$ is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$. JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-a-meter-bridge-experiment-to-determine-the-value-of-un-jee-main-physics-units-and-measurements-dfeyixhn9kzanyba)
[3 A cylindrical conductor of length 2 m and area of cross-section \$0.2 \\mathrm{~mm}^2\$ carries an electric current of 1.6 A when its ends are connected to a 2 V battery. Mobility of electrons in the conductor is \$\\alpha \\times 10^{-3} \\mathrm{~m}^2 / \\mathrm{V} . \\mathrm{s}\$. The value of \$\\alpha\$ is : (electron concentration \$=5 \\times 10^{28} / \\mathrm{m}^3\$ and electron charge \$=1.6 \\times 10^{-19} \\mathrm{C}\$ ) JEE Main 2026 (Online) 22nd January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-cylindrical-conductor-of-length-2-m-and-area-of-cross-s-jee-main-physics-units-and-measurements-l2ovl2wobrnuxkop)
[4 The heat generated in 1 minute between points \$A\$ and \$B\$ in the given circuit, when a battery of 9 V with internal resistance of \$1 \\Omega\$ is connected across these points is \$\\\_\\\_\\\_\\\_\$ J.  JEE Main 2026 (Online) 21st January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-heat-generated-in-1-minute-between-points-a-and-b-jee-main-physics-units-and-measurements-ja6vugy9m1tf3kny)
[5 Two cells of emfs 1 V and 2 V and internal resistances \$2 \\Omega\$ and \$1 \\Omega\$, respectively, are connected in series with an external resistance of \$6 \\Omega\$. The total current in the circuit is \$I\_1\$. Now the same two cells in parallel configuration are connected to same external resistance. In this case, the total current drawn is \$\\mathrm{I}\_2\$. The value of \$\\left(\\frac{\\mathrm{I}\_1}{\\mathrm{I}\_2}\\right)\$ is \$\\frac{x}{3}\$. The value of \$x\$ is\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2025 (Online) 3rd April Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-of-emfs-1-v-and-2-v-and-internal-resistances-2-jee-main-physics-units-and-measurements-a8sdpdlk7idnormv)
[6 In the figure shown below, a resistance of \$150.4 \\Omega\$ is connected in series to an ammeter A of resistance \$240 \\Omega\$. A shunt resistance of \$10 \\Omega\$ is connected in parallel with the ammeter. The reading of the ammeter is\_\_\_\_\_\_\_\_\_\_\_mA .  JEE Main 2025 (Online) 3rd April Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-figure-shown-below-a-resistance-of-1504-omega-is-jee-main-physics-units-and-measurements-r2ne8kxilbqxutz9)
[7 The value of current I in the electrical circuit as given below, when potential at A is equal to the potential at B, will be \_\_\_\_\_\_\_ A.  JEE Main 2025 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-value-of-current-i-in-the-electrical-circuit-as-given-jee-main-physics-v4zqqm5ecaf8crvr)
[8 A wire of resistance \$9 \\Omega\$ is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be \_\_\_\_\_\_\_\_\_ ohm. JEE Main 2025 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-9-omega-is-bent-to-form-an-equila-jee-main-physics-units-and-measurements-bofvjvmear2xl9uy)
[9 The net current flowing in the given circuit is \_\_\_\_\_\_\_\_\_\_ A.  JEE Main 2025 (Online) 22nd January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-net-current-flowing-in-the-given-circuit-is--jee-main-physics-units-and-measurements-xm1etv4w9rlb02iq)
[10 To determine the resistance (R) of a wire, a circuit is designed below. The \$\$V\$\$-\$\$I\$\$ characteristic curve for this circuit is plotted for the voltmeter and the ammeter readings as shown in figure. The value of \$R\$ is \_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2024 (Online) 9th April Evening Shift](https://questions.examside.com/past-years/jee/question/pto-determine-the-resistance-r-of-a-wire-a-circuit-is-d-jee-main-physics-motion-troinfut4t3hwjbp)
[11 At room temperature \$\$(27^{\\circ} \\mathrm{C})\$\$, the resistance of a heating element is \$\$50 \\Omega\$\$. The temperature coefficient of the material is \$\$2.4 \\times 10^{-4}{ }^{\\circ} \\mathrm{C}^{-1}\$\$. The temperature of the element, when its resistance is \$\$62 \\Omega\$\$, is \_\_\_\_\_\_\_\_\_\_\$\${ }^{\\circ} \\mathrm{C}\$\$. JEE Main 2024 (Online) 9th April Evening Shift](https://questions.examside.com/past-years/jee/question/pat-room-temperature-27circ-mathrmc-the-resi-jee-main-physics-motion-hoz6qlbrnrnc9s5u)
[12 The current flowing through the \$\$1 \\Omega\$\$ resistor is \$\$\\frac{n}{10}\$\$ A. The value of \$\$n\$\$ is \_\_\_\_\_\_\_.  JEE Main 2024 (Online) 9th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-flowing-through-the-1-omega-resistor-is-jee-main-physics-motion-vx9zxhmgm3nlj1ri)
[13 A heater is designed to operate with a power of \$\$1000 \\mathrm{~W}\$\$ in a \$\$100 \\mathrm{~V}\$\$ line. It is connected in combination with a resistance of \$\$10 \\Omega\$\$ and a resistance \$\$R\$\$, to a \$\$100 \\mathrm{~V}\$\$ mains as shown in figure. For the heater to operate at \$\$62.5 \\mathrm{~W}\$\$, the value of \$\$\\mathrm{R}\$\$ should be \_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2024 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-heater-is-designed-to-operate-with-a-power-of-1000-m-jee-main-physics-motion-lbu09abqqx5qvrp8)
[14 Resistance of a wire at \$\$0^{\\circ} \\mathrm{C}, 100^{\\circ} \\mathrm{C}\$\$ and \$\$t^{\\circ} \\mathrm{C}\$\$ is found to be \$\$10 \\Omega, 10.2 \\Omega\$\$ and \$\$10.95 \\Omega\$\$ respectively. The temperature \$\$t\$\$ in Kelvin scale is \_\_\_\_\_\_\_\_\_. JEE Main 2024 (Online) 8th April Morning Shift](https://questions.examside.com/past-years/jee/question/presistance-of-a-wire-at-0circ-mathrmc-100cir-jee-main-physics-motion-fygmuhve2dxgisak)
[15 In the given figure an ammeter A consists of a \$\$240 \\Omega\$\$ coil connected in parallel to a \$\$10 \\Omega\$\$ shunt. The reading of the ammeter is \_\_\_\_\_\_\_\_ \$\$\\mathrm{mA}\$\$.  JEE Main 2024 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-an-ammeter-a-consists-of-a-240-ome-jee-main-physics-motion-pxbqzpxnjigdzvea)
[16 A wire of resistance \$\$R\$\$ and radius \$\$r\$\$ is stretched till its radius became \$\$r / 2\$\$. If new resistance of the stretched wire is \$\$x ~R\$\$, then value of \$\$x\$\$ is \_\_\_\_\_\_\_\_. JEE Main 2024 (Online) 6th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-r-and-radius-r-is-stretched-jee-main-physics-motion-ohmymdvzpg0li180)
[17 A wire of resistance \$\$20 \\Omega\$\$ is divided into 10 equal parts, resulting pairs. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is \_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2024 (Online) 5th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-20-omega-is-divided-into-10-equ-jee-main-physics-motion-agdaof2cxzcsivc9)
[18 In the experiment to determine the galvanometer resistance by half-deflection method, the plot of \$\$1 / \\theta\$\$ vs the resistance (R) of the resistance box is shown in the figure. The figure of merit of the galvanometer is \_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-1} \\mathrm{~A} /\$\$ division. \[The source has emf \$\$2 \\mathrm{~V}\$\$\]  JEE Main 2024 (Online) 5th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-experiment-to-determine-the-galvanometer-resistanc-jee-main-physics-motion-qpc9xizmhwiwhsmg)
[19 Two wires \$\$A\$\$ and \$\$B\$\$ are made up of the same material and have the same mass. Wire \$\$A\$\$ has radius of \$\$2.0 \\mathrm{~mm}\$\$ and wire \$\$B\$\$ has radius of \$\$4.0 \\mathrm{~mm}\$\$. The resistance of wire \$\$B\$\$ is \$\$2 \\Omega\$\$. The resistance of wire \$\$A\$\$ is \_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2024 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-wires-a-and-b-are-made-up-of-the-same-materia-jee-main-physics-motion-fabimnlvjemcr0mo)
[20 Twelve wires each having resistance \$\$2 \\Omega\$\$ are joined to form a cube. A battery of \$\$6 \\mathrm{~V}\$\$ emf is joined across point \$\$a\$\$ and \$\$c\$\$. The voltage difference between \$\$e\$\$ and \$\$f\$\$ is \_\_\_\_\_\_\_\_ V.  JEE Main 2024 (Online) 4th April Morning Shift](https://questions.examside.com/past-years/jee/question/ptwelve-wires-each-having-resistance-2-omega-are-join-jee-main-physics-motion-ekecmnwxxkkjgktt)
[21 The current in a conductor is expressed as \$I=3 t^2+4 t^3\$, where \$I\$ is in Ampere and \$t\$ is in second. The amount of electric charge that flows through a section of the conductor during \$t=1 \\mathrm{~s}\$ to \$t=2 \\mathrm{~s}\$ is \_\_\_\_\_\_\_\_\_\_ C. JEE Main 2024 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/the-current-in-a-conductor-is-expressed-as-i3-t24-t3-jee-main-physics-zgz5krztrugza7xp)
[22 In the following circuit, the battery has an emf of \$\$2 \\mathrm{~V}\$\$ and an internal resistance of \$\$\\frac{2}{3} \\Omega\$\$. The power consumption in the entire circuit is \_\_\_\_\_\_\_\_\_ W.  JEE Main 2024 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-following-circuit-the-battery-has-an-emf-of-2--jee-main-physics-motion-evfulmhlb80yoqxq)
[23 Equivalent resistance of the following network is \_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2024 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/pequivalent-resistance-of-the-following-network-is--jee-main-physics-motion-dmrnx1y9jvqjq3zq)
[24 Two resistance of \$\$100 \\Omega\$\$ and \$\$200 \\Omega\$\$ are connected in series with a battery of \$\$4 \\mathrm{~V}\$\$ and negligible internal resistance. A voltmeter is used to measure voltage across \$\$100 \\Omega\$\$ resistance, which gives reading as \$\$1 \\mathrm{~V}\$\$. The resistance of voltmeter must be \_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2024 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistance-of-100-omega-and-200-omega-are-c-jee-main-physics-motion-i36tcbmwvrqjmtv5)
[25 Two cells are connected in opposition as shown. Cell \$\$\\mathrm{E}\_1\$\$ is of \$\$8 \\mathrm{~V}\$\$ emf and \$\$2 \\Omega\$\$ internal resistance; the cell \$\$\\mathrm{E}\_2\$\$ is of \$\$2 \\mathrm{~V}\$\$ emf and \$\$4 \\Omega\$\$ internal resistance. The terminal potential difference of cell \$\$\\mathrm{E}\_2\$\$ is \_\_\_\_\_\_\_\_\_\_ V.  JEE Main 2024 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-are-connected-in-opposition-as-shown-cell-m-jee-main-physics-motion-d0h4h736grezfign)
[26 In the given circuit, the current flowing through the resistance \$\$20 \\Omega\$\$ is \$\$0.3 \\mathrm{~A}\$\$, while the ammeter reads \$\$0.9 \\mathrm{~A}\$\$. The value of \$\$\\mathrm{R}\_1\$\$ is \_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2024 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-current-flowing-through-the-res-jee-main-physics-motion-gbzcipm1lyajcoob)
[27 A network of four resistances is connected to \$9 \\mathrm{~V}\$ battery, as shown in figure. The magnitude of voltage difference between the points \$\\mathrm{A}\$ and \$\\mathrm{B}\$ is \_\_\_\_\_\_\_\_\_\_ \$V\$.  JEE Main 2023 (Online) 15th April Morning Shift](https://questions.examside.com/past-years/jee/question/a-network-of-four-resistances-is-connected-to-9-mathrmv-jee-main-physics-zexdhbit50txtkfq)
[28 When a resistance of \$\$5 ~\\Omega\$\$ is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of \$\$250 \\mathrm{~mA}\$\$, however when \$\$1050 ~\\Omega\$\$ resistance is connected with it in series, it gives full scale deflection for 25 volt. The resistance of galvanometer is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2023 (Online) 13th April Morning Shift](https://questions.examside.com/past-years/jee/question/pwhen-a-resistance-of-5-omega-is-shunted-with-a-movi-jee-main-physics-motion-jdglomh08pdlslso)
[29 A potential \$\$\\mathrm{V}\_{0}\$\$ is applied across a uniform wire of resistance \$\$R\$\$. The power dissipation is \$\$P\_{1}\$\$. The wire is then cut into two equal halves and a potential of \$\$V\_{0}\$\$ is applied across the length of each half. The total power dissipation across two wires is \$\$P\_{2}\$\$. The ratio \$\$P\_{2}: \\mathrm{P}\_{1}\$\$ is \$\$\\sqrt{x}: 1\$\$. The value of \$\$x\$\$ is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 13th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-potential-mathrmv0-is-applied-across-a-unifor-jee-main-physics-motion-zrwwvtzzkfru7dfd)
[30 The current flowing through a conductor connected across a source is \$\$2 \\mathrm{~A}\$\$ and 1.2 \$\$\\mathrm{A}\$\$ at \$\$0^{\\circ} \\mathrm{C}\$\$ and \$\$100^{\\circ} \\mathrm{C}\$\$ respectively. The current flowing through the conductor at \$\$50^{\\circ} \\mathrm{C}\$\$ will be \_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{2} \\mathrm{~mA}\$\$. JEE Main 2023 (Online) 12th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-flowing-through-a-conductor-connected-across-jee-main-physics-motion-nizfgattzvqtbtu7)
[31 Two identical cells each of emf \$\$1.5 \\mathrm{~V}\$\$ are connected in series across a \$\$10 ~\\Omega\$\$ resistance. An ideal voltmeter connected across \$\$10 ~\\Omega\$\$ resistance reads \$\$1.5 \\mathrm{~V}\$\$. The internal resistance of each cell is \_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2023 (Online) 11th April Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-cells-each-of-emf-15-mathrmv-are-c-jee-main-physics-motion-yoim1lce1bylilxu)
[32 In the circuit diagram shown in figure given below, the current flowing through resistance \$\$3 ~\\Omega\$\$ is \$\$\\frac{x}{3} A\$\$. The value of \$\$x\$\$ is \_\_\_\_\_\_\_\_\_\_\_  JEE Main 2023 (Online) 11th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-circuit-diagram-shown-in-figure-given-below-the-c-jee-main-physics-motion-ntyzfxvkaosv519o)
[33 A rectangular parallelopiped is measured as \$\$1 \\mathrm{~cm} \\times 1 \\mathrm{~cm} \\times 100 \\mathrm{~cm}\$\$. If its specific resistance is \$\$3 \\times 10^{-7} ~\\Omega \\mathrm{m}\$\$, then the resistance between its two opposite rectangular faces will be \_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-7} ~\\Omega\$\$. JEE Main 2023 (Online) 10th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-rectangular-parallelopiped-is-measured-as-1-mathrm-jee-main-physics-motion-uec2a6hampm4vxbv)
[34 10 resistors each of resistance 10 \$\$\\Omega\$\$ can be connected in such as to get maximum and minimum equivalent resistance. The ratio of maximum and minimum equivalent resistance will be \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 10th April Morning Shift](https://questions.examside.com/past-years/jee/question/p10-resistors-each-of-resistance-10-omega-can-be-conn-jee-main-physics-motion-qnzuhpkabwxy3auf)
[35 The number density of free electrons in copper is nearly \$\$8 \\times 10^{28} \\mathrm{~m}^{-3}\$\$. A copper wire has its area of cross section \$\$=2 \\times 10^{-6} \\mathrm{~m}^{2}\$\$ and is carrying a current of \$\$3.2 \\mathrm{~A}\$\$. The drift speed of the electrons is \_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-6} \\mathrm{ms}^{-1}\$\$ JEE Main 2023 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-number-density-of-free-electrons-in-copper-is-nearly-jee-main-physics-motion-iv8tb4vtpe4aorkm)
[36 A current of \$\$2 \\mathrm{~A}\$\$ flows through a wire of cross-sectional area \$\$25.0 \\mathrm{~mm}^{2}\$\$. The number of free electrons in a cubic meter are \$\$2.0 \\times 10^{28}\$\$. The drift velocity of the electrons is \_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-6} \\mathrm{~ms}^{-1}\$\$ (given, charge on electron \$\$=1.6 \\times 10^{-19} \\mathrm{C}\$\$ ). JEE Main 2023 (Online) 8th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-current-of-2-mathrma-flows-through-a-wire-of-cr-jee-main-physics-motion-xtfoqnggnf0oamie)
[37 As shown in the figure, the voltmeter reads \$\$2 \\mathrm{~V}\$\$ across \$\$5 ~\\Omega\$\$ resistor. The resistance of the voltmeter is \_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2023 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pas-shown-in-the-figure-the-voltmeter-reads-2-mathrm-jee-main-physics-motion-ierq087j4xkwxphy)
[38 The length of a metallic wire is increased by \$\$20 \\%\$\$ and its area of cross section is reduced by \$\$4 \\%\$\$. The percentage change in resistance of the metallic wire is \_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 6th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-length-of-a-metallic-wire-is-increased-by-20--a-jee-main-physics-motion-4zvmabw6vdhpxhao)
[39 In the given circuit, the value of \$\$\\left\| {{{{\\mathrm{I\_1}} + {\\mathrm{I\_3}}} \\over {{\\mathrm{I\_2}}}}} \\right\|\$\$ is \_\_\_\_\_\_\_\_\_\_\_\_\_  JEE Main 2023 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-value-of-left-mathrmi-jee-main-physics-motion-kzbibhjsjcg7vjxn)
[40 In an experiment to find emf of a cell using potentiometer, the length of null point for a cell of emf \$\$1.5 \\mathrm{~V}\$\$ is found to be \$\$60 \\mathrm{~cm}\$\$. If this cell is replaced by another cell of emf E, the length-of null point increases by \$\$40 \\mathrm{~cm}\$\$. The value of \$\$E\$\$ is \$\$\\frac{x}{10} V\$\$. The value of \$\$x\$\$ is \_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/pin-an-experiment-to-find-emf-of-a-cell-using-potentiomete-jee-main-physics-motion-frt985tvmplsclkz)
[41 Two identical cells, when connected either in parallel or in series gives same current in an external resistance \$\$5 ~\\Omega\$\$. The internal resistance of each cell will be \_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2023 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-cells-when-connected-either-in-parallel-or-jee-main-physics-motion-2tvyueqxxu0gw5hj)
[42 If the potential difference between \$\\mathrm{B}\$ and \$\\mathrm{D}\$ is zero, the value of \$x\$ is \$\\frac{1}{n} \\Omega\$. The value of \$n\$ is \_\_\_\_\_\_\_\_\_\_.  JEE Main 2023 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/pif-the-potential-difference-between-mathrmb-and-ma-jee-main-physics-5fwed8bfzu4pdjgf)
[43 In the following circuit, the magnitude of current I1, is \_\_\_\_\_\_\_\_\_\_\_ A.  JEE Main 2023 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-following-circuit-the-magnitude-of-current-isub-jee-main-physics-motion-bv0vz330rwzzjtwy)
[44 A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by 5\$\$\\Omega\$\$. When a resistance of 15\$\$\\Omega\$\$ is used for shunting, null point moves to 300 cm. The internal resistance of the cell is \_\_\_\_\_\_\_\_\_\_\_\$\$\\Omega\$\$. JEE Main 2023 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-null-point-is-found-at-200-cm-in-potentiometer-when-cel-jee-main-physics-motion-0wswvdabxjruicll)
[45 When two resistance \$\$\\mathrm{R\_1}\$\$ and \$\$\\mathrm{R\_2}\$\$ connected in series and introduced into the left gap of a meter bridge and a resistance of 10 \$\$\\Omega\$\$ is introduced into the right gap, a null point is found at 60 cm from left side. When \$\$\\mathrm{R\_1}\$\$ and \$\$\\mathrm{R\_2}\$\$ are connected in parallel and introduced into the left gap, a resistance of 3 \$\$\\Omega\$\$ is introduced into the right gap to get null point at 40 cm from left end. The product of \$\$\\mathrm{R\_1}\$\$ \$\$\\mathrm{R\_2}\$\$ is \_\_\_\_\_\_\_\_\_\_\_\_\$\$\\Omega^2\$\$ JEE Main 2023 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwhen-two-resistance-mathrmr1-and-mathrmr2-jee-main-physics-motion-9cqlzyww0rpwmsz2)
[46 In a metre bridge experiment the balance point is obtained if the gaps are closed by 2\$\$\\Omega\$\$ and 3\$\$\\Omega\$\$. A shunt of X \$\$\\Omega\$\$ is added to 3\$\$\\Omega\$\$ resistor to shift the balancing point by 22.5 cm. The value of X is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-a-metre-bridge-experiment-the-balance-point-is-obtaine-jee-main-physics-motion-zokhswpejrfwuirs)
[47 Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal resistance of 3\$\$\\Omega\$\$. Cell 2 has emf of 6V and internal resistance of 6\$\$\\Omega\$\$. An external resistor R of 4\$\$\\Omega\$\$ is connected across A and B. The current flowing through R will be \_\_\_\_\_\_\_\_\_\_\_\_ A.  JEE Main 2023 (Online) 25th January Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-are-connected-between-points-a-and-b-as-shown-jee-main-physics-motion-0jrr9jn21duwh8lf)
[48 In the given circuit, the equivalent resistance between the terminal A and B is \_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2023 (Online) 25th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-equivalent-resistance-between-t-jee-main-physics-motion-3wllgyv58fwamvmv)
[49 If a copper wire is stretched to increase its length by 20%. The percentage increase in resistance of the wire is \_\_\_\_\_\_\_\_\_\_%. JEE Main 2023 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pif-a-copper-wire-is-stretched-to-increase-its-length-by-2-jee-main-physics-motion-xqfdcnvndhywrumr)
[50 A hollow cylindrical conductor has length of 3.14 m, while its inner and outer diameters are 4 mm and 8 mm respectively. The resistance of the conductor is \$\$n\\times10^{-3}\\Omega\$\$. If the resistivity of the material is \$\$\\mathrm{2.4\\times10^{-8}\\Omega m}\$\$. The value of \$\$n\$\$ is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-hollow-cylindrical-conductor-has-length-of-314-m-whil-jee-main-physics-motion-7eqcysop6wmqb125)
[51 The current I flowing through the given circuit will be \_\_\_\_\_\_\_\_\_\_A.  JEE Main 2022 (Online) 29th July Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-i-flowing-through-the-given-circuit-will-be--jee-main-physics-motion-33cucqvg31ar9oiq)
[52 An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220 V, 60 W. If the voltage across combination is 220 V, the power consumed by the 100 W bulb will be about \_\_\_\_\_\_\_ W. JEE Main 2022 (Online) 28th July Evening Shift](https://questions.examside.com/past-years/jee/question/pan-electrical-bulb-rated-220-v-100-w-is-connected-in-se-jee-main-physics-motion-ozgw1wamvale0bc1)
[53 As shown in the figure, a potentiometer wire of resistance \$\$20 \\,\\Omega\$\$ and length \$\$300 \\mathrm{~cm}\$\$ is connected with resistance box (R.B.) and a standard cell of emf \$\$4 \\mathrm{~V}\$\$. For a resistance '\$\$R\$\$' of resistance box introduced into the circuit, the null point for a cell of \$\$20 \\,\\mathrm{mV}\$\$ is found to be \$\$60 \\mathrm{~cm}\$\$. The value of '\$\$R\$\$' is \_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega .\$\$  JEE Main 2022 (Online) 28th July Morning Shift](https://questions.examside.com/past-years/jee/question/pas-shown-in-the-figure-a-potentiometer-wire-of-resistanc-jee-main-physics-motion-vatkcqchuzbuk89q)
[54 In the given figure of meter bridge experiment, the balancing length AC corresponding to null deflection of the galvanometer is \$\$40 \\mathrm{~cm}\$\$. The balancing length, if the radius of the wire \$\$\\mathrm{AB}\$\$ is doubled, will be \_\_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\mathrm{cm}\$\$.  JEE Main 2022 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-of-meter-bridge-experiment-the-balan-jee-main-physics-motion-geuptmnat7srrwzv)
[55 In a meter bridge experiment, for measuring unknown resistance 'S', the null point is obtained at a distance \$\$30 \\mathrm{~cm}\$\$ from the left side as shown at point D. If R is \$\$5.6\$\$ \$\$\\mathrm{k} \\Omega\$\$, then the value of unknown resistance 'S' will be \_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2022 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/pin-a-meter-bridge-experiment-for-measuring-unknown-resis-jee-main-physics-motion-kh65ttap3u3oqu0j)
[56 A \$\$1 \\mathrm{~m}\$\$ long copper wire carries a current of \$\$1 \\mathrm{~A}\$\$. If the cross section of the wire is \$\$2.0 \\mathrm{~mm}^{2}\$\$ and the resistivity of copper is \$\$1.7 \\times 10^{-8}\\, \\Omega \\mathrm{m}\$\$, the force experienced by moving electron in the wire is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-23} \\mathrm{~N}\$\$. (charge on electorn \$\$=1.6 \\times 10^{-19} \\,\\mathrm{C}\$\$) JEE Main 2022 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/pa-1-mathrmm-long-copper-wire-carries-a-current-of-jee-main-physics-motion-040um67awgj3jw1j)
[57 A potentiometer wire of length \$\$300 \\mathrm{~cm}\$\$ is connected in series with a resistance 780 \$\$\\Omega\$\$ and a standard cell of emf \$\$4 \\mathrm{V}\$\$. A constant current flows through potentiometer wire. The length of the null point for cell of emf \$\$20\\, \\mathrm{mV}\$\$ is found to be \$\$60 \\mathrm{~cm}\$\$. The resistance of the potentiometer wire is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2022 (Online) 26th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-potentiometer-wire-of-length-300-mathrmcm-is-co-jee-main-physics-motion-vrawlf2xx3veaupm)
[58 Resistances are connected in a meter bridge circuit as shown in the figure. The balancing length \$\$l\_{1}\$\$ is \$\$40 \\mathrm{~cm}\$\$. Now an unknown resistance \$\$x\$\$ is connected in series with \$\$\\mathrm{P}\$\$ and new balancing length is found to be \$\$80 \\mathrm{~cm}\$\$ measured from the same end. Then the value of \$\$x\$\$ will be \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2022 (Online) 26th July Morning Shift](https://questions.examside.com/past-years/jee/question/presistances-are-connected-in-a-meter-bridge-circuit-as-sh-jee-main-physics-motion-ytlnssyx9dyg8ozl)
[59 In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now replaced by another cell of emf 1.80 V. The difference in balancing length of potentiometer wire in above conditions will be \_\_\_\_\_\_\_\_\_\_\_ cm. JEE Main 2022 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/pin-a-potentiometer-arrangement-a-cell-of-emf-120-v-give-jee-main-physics-motion-l46shmhgdqmacvxl)
[60 In the given figure, the value of Vo will be \_\_\_\_\_\_\_\_\_\_\_\_\_ V.  JEE Main 2022 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-the-value-of-vsubosub-will-be--jee-main-physics-motion-bruldk53rn8ceqlv)
[61 Eight copper wire of length \$\$l\$\$ and diameter \$\$d\$\$ are joined in parallel to form a single composite conductor of resistance \$\$R\$\$. If a single copper wire of length \$\$2 l\$\$ have the same resistance \$\$(R)\$\$ then its diameter will be \_\_\_\_\_\_\_\_\_\_\_\_ d. JEE Main 2022 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/peight-copper-wire-of-length-l-and-diameter-d-are-jee-main-physics-motion-zslwm9c8vpgfgs0h)
[62 The circuit diagram of potentiometer used to measure the internal resistance of a cell (E) is shown in figure. The key 'K' is kept closed so as to send constant current through potentiometer wire. When key 'K1' is kept open the null point is found to be at 120 cm on the potentiometer wire. When the key 'K1' is closed the null point is shifted at 80 cm at the potentiometer wire. The internal resistance of the given cell is \_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2022 (Online) 30th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-circuit-diagram-of-potentiometer-used-to-measure-the-jee-main-physics-motion-la7dnbyq2r1tbuzi)
[63 Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance 2000 \$\$\\Omega\$\$ is used to measure the potential difference across 500 \$\$\\Omega\$\$ resistor, the reading of the voltmeter will be \_\_\_\_\_\_\_\_\_\_\_ V.  JEE Main 2022 (Online) 29th June Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistors-are-connected-in-series-across-a-battery-as-jee-main-physics-motion-towvfriaqicl8g26)
[64 The variation of applied potential and current flowing through a given wire is shown in figure. The length of wire is 31.4 cm. The diameter of wire is measured as 2.4 cm. The resistivity of the given wire is measured as x \$\$\\times\$\$ 10\$\$-\$\$3 \$\$\\Omega\$\$ cm. The value of x is \_\_\_\_\_\_\_\_\_\_\_\_. \[Take \$\$\\pi\$\$ = 3.14\]  JEE Main 2022 (Online) 29th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-variation-of-applied-potential-and-current-flowing-th-jee-main-physics-motion-k5wdfpjhsz1vg473)
[65 For the network shown below, the value of VB \$\$-\$\$ VA is \_\_\_\_\_\_\_\_\_\_\_\_ V.  JEE Main 2022 (Online) 29th June Morning Shift](https://questions.examside.com/past-years/jee/question/pfor-the-network-shown-below-the-value-of-vsubbsub--jee-main-physics-motion-rhmq640dmrzqkedd)
[66 All resistances in figure are 1 \$\$\\Omega\$\$ each. The value of current 'I' is \$\${a \\over 5}\$\$ A. The value of a is \_\_\_\_\_\_\_\_\_.  JEE Main 2022 (Online) 28th June Evening Shift](https://questions.examside.com/past-years/jee/question/pall-resistances-in-figure-are-1-omega-each-the-valu-jee-main-physics-motion-vpubs5ae2jbm6rs7)
[67 A meter bridge setup is shown in the figure. It is used to determine an unknown resistance R using a given resistor of 15 \$\$\\Omega\$\$. The galvanometer (G) shows null deflection when tapping key is at 43 cm mark from end A. If the end correction for end A is 2 cm, then the determined value of R will be \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2022 (Online) 28th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-meter-bridge-setup-is-shown-in-the-figure-it-is-used-t-jee-main-physics-motion-84behrl1ks9owllz)
[68 Current measured by the ammeter (A) in the reported circuit when no current flows through 10 \$\$\\Omega\$\$ resistance, will be \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ A.  JEE Main 2022 (Online) 28th June Morning Shift](https://questions.examside.com/past-years/jee/question/pcurrent-measured-by-the-ammeter-a-in-the-reported-circu-jee-main-physics-motion-xvcbrwswognsrraw)
[69 The current density in a cylindrical wire of radius r = 4.0 mm is 1.0 \$\$\\times\$\$ 106 A/m2. The current through the outer portion of the wire between radial distances \$\${r \\over 2}\$\$ and r is x\$\$\\pi\$\$ A; where x is \_\_\_\_\_\_\_\_\_\_. JEE Main 2022 (Online) 27th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-current-density-in-a-cylindrical-wire-of-radius-r--4-jee-main-physics-motion-iockwwuguvk1mwlx)
[70 In the given circuit 'a' is an arbitrary constant. The value of m for which the equivalent circuit resistance is minimum, will be \$\$\\sqrt {{x \\over 2}} \$\$. The value of x is \_\_\_\_\_\_\_\_\_\_.  JEE Main 2022 (Online) 27th June Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-a-is-an-arbitrary-constant-the-va-jee-main-physics-motion-y8ymtseid0fvv5b6)
[71 A cell, shunted by a 8 \$\$\\Omega\$\$ resistance, is balanced across a potentiometer wire of length 3 m. The balancing length is 2 m when the cell is shunted by 4 \$\$\\Omega\$\$ resistance. The value of internal resistance of the cell will be \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2022 (Online) 27th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-cell-shunted-by-a-8-omega-resistance-is-balanced-jee-main-physics-motion-8d697umrjg29gsee)
[72 The current density in a cylindrical wire of radius 4 mm is 4 \$\$\\times\$\$ 106 Am\$\$-\$\$2. The current through the outer portion of the wire between radial distances \$\${R \\over 2}\$\$ and R is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\pi\$\$ A. JEE Main 2022 (Online) 27th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-density-in-a-cylindrical-wire-of-radius-4-mm-jee-main-physics-motion-icyxmngndbfgvrnf)
[73 The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance of the wire will be \_\_\_\_\_\_\_\_\_\_\_\_ %. JEE Main 2022 (Online) 25th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-length-of-a-given-cylindrical-wire-is-increased-to-do-jee-main-physics-motion-ic0kszpws0he8bej)
[74 A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10 s is \_\_\_\_\_\_\_\_\_\_\_\_ J. JEE Main 2022 (Online) 25th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-resistor-develops-300-j-of-thermal-energy-in-15-s-when-jee-main-physics-motion-4pdhu47zbgz3jjxn)
[75 The total current supplied to the circuit as shown in figure by the 5 V battery is \_\_\_\_\_\_\_\_\_\_\_\_ A.  JEE Main 2022 (Online) 25th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-total-current-supplied-to-the-circuit-as-shown-in-fig-jee-main-physics-motion-tizo1nm2r7olfgog)
[76 A potentiometer wire of length 10 m and resistance 20 \$\$\\Omega\$\$ is connected in series with a 25 V battery and an external resistance 30 \$\$\\Omega\$\$. A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of E (in volt) is \$\${x \\over {10}}\$\$. The value of x is \_\_\_\_\_\_\_\_\_\_. JEE Main 2022 (Online) 24th June Evening Shift](https://questions.examside.com/past-years/jee/question/pa-potentiometer-wire-of-length-10-m-and-resistance-20--jee-main-physics-motion-b7g7dhrxzzfkkk5j)
[77 In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now replaced by another cell of unknown emf. If the ratio of the emf's of two cells respectively is 3 : 2, the difference in the balancing length of the potentiometer wire in above two cases will be \_\_\_\_\_\_\_\_\_\_\_ cm. JEE Main 2022 (Online) 24th June Morning Shift](https://questions.examside.com/past-years/jee/question/pin-a-potentiometer-arrangement-a-cell-gives-a-balancing-jee-main-physics-motion-vy87pdbfcck0ocsl)
[78 A uniform heating wire of resistance 36\$\$\\Omega\$\$ is connected across a potential difference of 240 V. The wire is then cut into half and potential difference of 240V is applied across each half separately. The ratio of power dissipation in first case to the total power dissipation in the second case would be 1 : x, where x is \_\_\_\_\_\_\_\_\_\_\_\_ JEE Main 2021 (Online) 1st September Evening Shift](https://questions.examside.com/past-years/jee/question/a-uniform-heating-wire-of-resistance-36omega-is-connect-jee-main-physics-units-and-measurements-bbfyuhzpw4qo9ye4)
[79 A resistor dissipates 192 J of energy in 1s when a current of 4A is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in 5s in \_\_\_\_\_\_\_\_\_ J. JEE Main 2021 (Online) 31st August Evening Shift](https://questions.examside.com/past-years/jee/question/a-resistor-dissipates-192-j-of-energy-in-1s-when-a-current-o-jee-main-physics-units-and-measurements-xwupyc0zvlquc9mn)
[80 A square shaped wire with resistance of each side 3\$\$\\Omega\$\$ is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in unit of \$\$\\Omega\$\$ will be \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 31st August Morning Shift](https://questions.examside.com/past-years/jee/question/a-square-shaped-wire-with-resistance-of-each-side-3omega-jee-main-physics-units-and-measurements-bdsemobzdbqjf1ip)
[81 The voltage drop across 15\$\$\\Omega\$\$ resistance in the given figure will be \_\_\_\_\_\_\_\_\_\_\_\_\_\_ V.  JEE Main 2021 (Online) 31st August Morning Shift](https://questions.examside.com/past-years/jee/question/the-voltage-drop-across-15omega-resistance-in-the-given-jee-main-physics-units-and-measurements-7qzqysecknkyqmib)
[82 The ratio of the equivalent resistance of the network (shown in figure) between the points a and b when switch is open and switch is closed is x : 8. The value of x is \_\_\_\_\_\_\_\_\_\_\_.  JEE Main 2021 (Online) 27th August Evening Shift](https://questions.examside.com/past-years/jee/question/the-ratio-of-the-equivalent-resistance-of-the-network-shown-jee-main-physics-units-and-measurements-b5tttkpieaetbzpl)
[83 First, a set of n equal resistors of 10 \$\$\\Omega\$\$ each are connected in series to a battery of emf 20V and internal resistance 10\$\$\\Omega\$\$. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is ............... . JEE Main 2021 (Online) 27th August Morning Shift](https://questions.examside.com/past-years/jee/question/first-a-set-of-n-equal-resistors-of-10-omega-each-are-jee-main-physics-units-and-measurements-zuswitntwjsrkwmo)
[84 For the circuit shown, the value of current at time t = 3.2 s will be \_\_\_\_\_\_\_\_\_ A.  \[Voltage distribution V(t) is shown by Fig. (1) and the circuit is shown in Fig. (2)\] JEE Main 2021 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/for-the-circuit-shown-the-value-of-current-at-time-t--32-jee-main-physics-units-and-measurements-9niqaioflizdotsv)
[85 A 16 \$\$\\Omega\$\$ wire is bend to form a square loop. A 9V supply having internal resistance of 1\$\$\\Omega\$\$ is connected across one of its sides. The potential drop across the diagonals of the square loop is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\times\$\$ 10\$\$-\$\$1 V JEE Main 2021 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/a-16-omega-wire-is-bend-to-form-a-square-loop-a-9v-sup-jee-main-physics-units-and-measurements-0cvisunqa428abic)
[86 An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The resistance 'R' that must be put in series with the bulb so that the bulb delivers the same power is \_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2021 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/an-electric-bulb-rated-as-200-w-at-100-v-is-used-in-a-circui-jee-main-physics-units-and-measurements-qawyeh21shdqakxr)
[87 In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5\$\$\\Omega\$\$. However, it provides a potential difference of 1 V across a load resistance of 2\$\$\\Omega\$\$. The emf of the cell is given by \$\${x \\over {10}}V\$\$. Then the value of x is \_\_\_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 22th July Evening Shift](https://questions.examside.com/past-years/jee/question/in-an-electric-circuit-a-cell-of-certain-emf-provides-a-pot-jee-main-physics-units-and-measurements-ftq36txeyerqmxuy)
[88 In the given figure switches S1 and S2 are in open condition. The resistance across ab when the switches S1 and S2 are closed is \_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$.  JEE Main 2021 (Online) 20th July Evening Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-switches-ssub1sub-and-ssub2sub-jee-main-physics-units-and-measurements-i447nbf9evr0eaki)
[89 Two wires of same length and thickness having specific resistances 6\$\$\\Omega\$\$ cm and 3\$\$\\Omega\$\$ cm respectively are connected in parallel. The effective resistivity is \$\$\\rho\$\$\$\$\\Omega\$\$ cm. The value of \$\$\\rho\$\$, to the nearest integer, is \_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 18th March Evening Shift](https://questions.examside.com/past-years/jee/question/two-wires-of-same-length-and-thickness-having-specific-resis-jee-main-physics-units-and-measurements-tt4vuhie8cq3hltt)
[90 Consider a 72 cm long wire AB as shown in the figure. The galvanometer jockey is placed at P on AB at a distance x cm from A. The galvanometer shows zero deflection.  The value of x, to the nearest integer, is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 18th March Evening Shift](https://questions.examside.com/past-years/jee/question/consider-a-72-cm-long-wire-ab-as-shown-in-the-figure-the-ga-jee-main-physics-units-and-measurements-nuvlqncqc3uoaqlp)
[91 The voltage across the 10\$\$\\Omega\$\$ resistor in the given circuit is x volt.  The value of 'x' to the nearest integer is \_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 18th March Morning Shift](https://questions.examside.com/past-years/jee/question/the-voltage-across-the-10omega-resistor-in-the-given-ci-jee-main-physics-units-and-measurements-fdh1yqszj0etge3j)
[92 The equivalent resistance of series combination of two resistors is 's'. When they are connected in parallel, the equivalent resistance is 'p'. If s = np, then the minimum value for n is \_\_\_\_\_\_\_\_\_\_\_\_. (Round off to the Nearest Integer) JEE Main 2021 (Online) 17th March Morning Shift](https://questions.examside.com/past-years/jee/question/the-equivalent-resistance-of-series-combination-of-two-resis-jee-main-physics-units-and-measurements-w0lan8vdf8dtraxy)
[93 The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is \_\_\_\_\_\_\_\_\_\_\_\$\$\\Omega\$\$. (Round off to the Nearest Integer) JEE Main 2021 (Online) 16th March Evening Shift](https://questions.examside.com/past-years/jee/question/the-energy-dissipated-by-a-resistor-is-10-mj-in-1-s-when-an-jee-main-physics-units-and-measurements-kt5ikfryjuetykfy)
[94 In the figure given, the electric current flowing through the 5 k\$\$\\Omega\$\$ resistor is 'x' mA.  The value of x to the nearest integer is \_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 16th March Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-figure-given-the-electric-current-flowing-through-th-jee-main-physics-units-and-measurements-59jzdrpws0xie1av)
[95 In an electrical circuit, a battery is connected to pass 20C of charge through it in a certain given time. The potential difference between two plates of the battery is maintained at 15V. The workdone by the battery is \_\_\_\_\_\_\_\_\_\_J. JEE Main 2021 (Online) 26th February Morning Shift](https://questions.examside.com/past-years/jee/question/in-an-electrical-circuit-a-battery-is-connected-to-pass-20c-jee-main-physics-units-and-measurements-yntbkfl4gzclnqcm)
[96 A current of 6A enters one corner P of an equilateral triangle PQR having 3 wires of resistance 2\$\$\\Omega\$\$ each and leaves by the corner R. The currents i1 in ampere is \_\_\_\_\_\_\_\_\_.  JEE Main 2021 (Online) 25th February Evening Shift](https://questions.examside.com/past-years/jee/question/a-current-of-6a-enters-one-corner-p-of-an-equilateral-triang-jee-main-physics-units-and-measurements-lxixkny2wlgumgkd)
[97 In the given circuit of potentiometer, the potential difference E across AB (10 m length) is larger than E1 and E2 as well. For key K1 (closed), the jockey is adjusted to touch the wire at point J1 so that there is no deflection in the galvanometer. Now the first battery (E1) is replaced by second battery (E2) for working by making K1 open and K2 closed. The galvanometer gives then null deflection at J2. The value of \$\${{{E\_1}} \\over {{E\_2}}}\$\$ is \$\${a \\over b}\$\$, where a = \_\_\_\_\_\_\_\_\_.  JEE Main 2021 (Online) 25th February Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-of-potentiometer-the-potential-differe-jee-main-physics-units-and-measurements-qfox2psp03t42ofm)
[98 A cylindrical wire of radius 0.5 mm and conductivity 5 \$\$\\times\$\$ 107 S/m is subjected to an electric field of 10 mV/m. The expected value of current in the wire will be x3\$\$\\pi\$\$ mA. The value of x is \_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 24th February Evening Shift](https://questions.examside.com/past-years/jee/question/a-cylindrical-wire-of-radius-05-mm-and-conductivity-5-ti-jee-main-physics-units-and-measurements-zkarctbb2fn9c9xy)
[99 Four resistances 40 \$\$\\Omega \$\$, 60 \$\$\\Omega \$\$, 90 \$\$\\Omega \$\$ and 110 \$\$\\Omega \$\$ make the arms of a quadrilateral ABCD. Across AC is a battery of emf 40 V and internal resistance negligible.The potential difference across BD in V is \_\_\_\_\_\_\_.  JEE Main 2020 (Online) 4th September Evening Slot](https://questions.examside.com/past-years/jee/question/four-resistances-40-omega--60-omega--90-omega-jee-main-physics-current-electricity-72k6mk9kge6jupyd)
[100 In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is \$\$l\$\$ = 25 cm. If R is replaced by a wire of half length and half diameter that of R of same material, then the balancing distance \$\$l'\$\$ (in cm) will now be\_\_\_\_\_\_\_\_.  JEE Main 2020 (Online) 9th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-s-is-a-standard-resistance-r-i-jee-main-physics-electrostatics-ktfjlxnsbyier5f2)
[101 The series combination of two batteries, both of the same emf 10 V, but different internal resistance of 20\$\$\\Omega \$\$ and 5\$\$\\Omega \$\$, is connected to the parallel combination of two resistors 30\$\$\\Omega \$\$ and R \$\$\\Omega \$\$. The voltage difference across the battery of internal resistance 20\$\$\\Omega \$\$ is zero, the value of R (in \$\$\\Omega \$\$) is : \_\_\_\_\_\_\_ JEE Main 2020 (Online) 8th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-series-combination-of-two-batteries-both-of-the-same-em-jee-main-physics-current-electricity-rkwmhr066gw8154z)
[102 Four resistances of 15\$\$\\Omega \$\$, 12\$\$\\Omega \$\$, 4\$\$\\Omega \$\$ and 10\$\$\\Omega \$\$ respectively in cyclic order to form Wheatstone's network. The resistance that is to be connected in parallel with the resistance of 10\$\$\\Omega \$\$ to balance the network is \_\_\_\_\_\$\$\\Omega \$\$. JEE Main 2020 (Online) 8th January Morning Slot](https://questions.examside.com/past-years/jee/question/four-resistances-of-15omega--12omega--4omega-jee-main-physics-current-electricity-okzc29mwqxhaxr0t)
[103 The balancing length for a cell is 560 cm in a potentiometer experiment. When an external resistance of 10 \$\$\\Omega \$\$ is connected in parallel to the cell, the balancing length changes by 60 cm. If the internal resistance of the ceil is \$\${N \\over {10}}\$\$ \$\$\\Omega \$\$ , where N is an integer then value of N is ............. JEE Main 2020 (Online) 7th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-balancing-length-for-a-cell-is-560-cm-in-a-potentiometer-jee-main-physics-electrostatics-ydmsmawwwkaxbd9s)
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| Readable Markdown | ## MCQ (Single Correct Answer)
[1 Which one of the following is **not** a measurable quantity? JEE Main 2026 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwhich-one-of-the-following-is-bnotb-a-measurable-qua-jee-main-physics-3rh0gmkgmyjnsvwe)
[2 JEE Main 2026 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-wheatstone-bridge-is-initially-at-room-temperature-and-jee-main-physics-y8ipqmlevbccyczi)
[3 For the two cells having same EMF \$E\$ and internal resistance \$r\$, the current passing through the external resistor \$6 \\Omega\$ is same when both the cells are connected either in parallel or in series. The value of internal resistance \$r\$ is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$. JEE Main 2026 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pfor-the-two-cells-having-same-emf-e-and-internal-resist-jee-main-physics-units-and-measurements-m8oudqivijh5thsd)
[4 In the potentiometer, when the cell in the secondary circuit is shunted with \$4 \\Omega\$ resistance, the balance is obtained at the length 120 cm of wire. Now when the same cell is shunted with \$12 \\Omega\$ resistance, the balance is shifted to a length of 180 cm . The internal resistance of cell is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$ JEE Main 2026 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-potentiometer-when-the-cell-in-the-secondary-circ-jee-main-physics-units-and-measurements-fyh5ffzrfxyw7uij)
[5 JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-reading-of-the-ammeter-a-in-steady-state-in-the-f-jee-main-physics-units-and-measurements-ykj9i65wry0c6w74)
[6 A moving coil galvanometer of resistance \$100 \\Omega\$ shows a full scale deflection for a current of 1 mA . The value of resistance required to convert this galvanometer into an ammeter, showing full scale deflection for a current of 5 mA , is \$\\\_\\\_\\\_\\\_\$ \$\\Omega\$ JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-moving-coil-galvanometer-of-resistance-100-omega-sho-jee-main-physics-units-and-measurements-vpusylnw7kbm5sdo)
[7 A regular hexagon is formed by six wires each of resistance \$r \\Omega\$ and the corners are joined to the centre by wires of same resistance. If the current enters at one corner and leaves at the opposite corner, the equivalent resistance of the hexagon between the two opposite corners will be JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-regular-hexagon-is-formed-by-six-wires-each-of-resistan-jee-main-physics-units-and-measurements-ymk21lxwct2czae9)
[8 Two resistors of \$100 \\Omega\$ each are connected in series with a 9 V battery. A voltmeter of \$400 \\Omega\$ resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is \$\\\_\\\_\\\_\\\_\$ V. JEE Main 2026 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistors-of-100-omega-each-are-connected-in-serie-jee-main-physics-units-and-measurements-cnte7hnlt8ttvnnz)
[9 JEE Main 2026 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistors-2-omega-and-3-omega-are-connected-in-jee-main-physics-units-and-measurements-ktc28fb4oothwlld)
[10 To compare EMF of two cells using potentiometer the balancing lengths obtained are 200 cm and 150 cm . The least count of scale is 1 cm . The percentage error in the ratio of EMFs is \$\\\_\\\_\\\_\\\_\$ JEE Main 2026 (Online) 23rd January Evening Shift](https://questions.examside.com/past-years/jee/question/pto-compare-emf-of-two-cells-using-potentiometer-the-balan-jee-main-physics-units-and-measurements-dufmemsx5mewwto9)
[11 JEE Main 2026 (Online) 23rd January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-uniform-resistance-lambda-omega--mathrmm-jee-main-physics-units-and-measurements-cu8xvjpvjimhfghw)
[12 An electric power line having total resistance of \$2 \\Omega\$, delivers 1 kW of power at 250 V . The percentage efficiency of transmission line is \$\\\_\\\_\\\_\\\_\$ . JEE Main 2026 (Online) 22nd January Evening Shift](https://questions.examside.com/past-years/jee/question/pan-electric-power-line-having-total-resistance-of-2-ome-jee-main-physics-units-and-measurements-saqwpil9ts1czrbq)
[13 JEE Main 2026 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/a-meter-bridge-with-two-resistances-r1-and-r2-as-shown-jee-main-physics-units-and-measurements-cq3nq02rgjat6pxr)
[14 JEE Main 2026 (Online) 21st January Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-known-resistances-of-r-omega-and-2r-omega-and-jee-main-physics-mypnrfs6ejvu56mo)
[15 JEE Main 2026 (Online) 21st January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-total-length-of-potentiometer-wire-ab-is-50-cm-in-the-jee-main-physics-dp4qfyqbbtody1se)
[16 A battery with EMF \$E\$ and internal resistance \$r\$ is connected across a resistance \$R\$. The power consumption in \$R\$ will be maximum when: JEE Main 2026 (Online) 21st January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-battery-with-emf-e-and-internal-resistance-r-is-con-jee-main-physics-t6wxsdkalwwwew8p)
[17 JEE Main 2025 (Online) 7th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-r-is-bent-into-a-triangular-pyrami-jee-main-physics-units-and-measurements-olpknthnchhzit6l)
[18 There are ' \$n\$ ' number of identical electric bulbs, each is designed to draw a power \$p\$ independently from the mains supply. They are now joined in series across the mains supply. The total power drawn by the combination is : JEE Main 2025 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthere-are--n--number-of-identical-electric-bulbs-eac-jee-main-physics-units-and-measurements-p7nig5n8uihcs7x8)
[19 From the combination of resistors with resistances values \$R\_1=R\_2=R\_3=5 \\Omega\$ and \$R\_4=10 \\Omega\$, which of the following combination is the best circuit to get an equivalent resistance of \$6 \\Omega\$ ? JEE Main 2025 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/pfrom-the-combination-of-resistors-with-resistances-values-jee-main-physics-units-and-measurements-zjdeve71uha6kkwn)
[20 Current passing through a wire as function of time is given as \$I(t)=0.02 t+0.01 \\mathrm{~A}\$. The charge that will flow through the wire from \$t=1 \\mathrm{~s}\$ to \$t=2 \\mathrm{~s}\$ is JEE Main 2025 (Online) 4th April Morning Shift](https://questions.examside.com/past-years/jee/question/pcurrent-passing-through-a-wire-as-function-of-time-is-giv-jee-main-physics-units-and-measurements-normuhmvbf8njmey)
[21 A motor operating on 100 V draws a current of 1 A . If the efficiency of the motor is \$91.6 \\%\$, then the loss of power in units of \$\\mathrm{cal} / \\mathrm{s}\$ is JEE Main 2025 (Online) 3rd April Evening Shift](https://questions.examside.com/past-years/jee/question/a-motor-operating-on-100-v-draws-a-current-of-1-a--if-the-e-jee-main-physics-units-and-measurements-72eiztwlz4p74x6u)
[22 A wire of length 25 m and cross-sectional area \$5 \\mathrm{~mm}^2\$ having resistivity of \$2 \\times 10^{-6} \\Omega \\mathrm{~m}\$ is bent into a complete circle. The resistance between diametrically opposite points will be JEE Main 2025 (Online) 3rd April Morning Shift](https://questions.examside.com/past-years/jee/question/a-wire-of-length-25-m-and-cross-sectional-area-5-mathrmm-jee-main-physics-units-and-measurements-s2orlk7myx2lx64x)
[23 The battery of a mobile phone is rated as \$4.2 \\mathrm{~V}, 5800 \\mathrm{~mAh}\$. How much energy is stored ir it when fully charged? JEE Main 2025 (Online) 2nd April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-battery-of-a-mobile-phone-is-rated-as-42-mathrmv-jee-main-physics-units-and-measurements-initugic8wxwswn0)
[24 JEE Main 2025 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements--one-is-labelled-as-bas-jee-main-physics-6wzzc0jwotwqtxlj)
[25 JEE Main 2025 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/img-srchttpsapp-contentcdnexamgoalnetflywidthim-jee-main-physics-uumayj0jzy2zhbjh)
[26 JEE Main 2025 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pfind-the-equivalent-resistance-between-two-ends-of-the-fo-jee-main-physics-units-and-measurements-9eouhtbbwrq0il9h)
[27 A wire of resistance R is bent into an equilateral triangle and an identical wire is bent into \$a\$ square. The ratio of resistance between the two end points of an edge of the triangle to that of the square is JEE Main 2025 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-r-is-bent-into-an-equilateral-triang-jee-main-physics-units-and-measurements-onmopqmtvc8dtixf)
[28 A galvanometer having a coil of resistance \$30 \\Omega\$ need 20 mA of current for full-scale deflection. If a maximum current of 3 A is to be measured using this galvanometer, the resistance of the shunt to be added to the galvanometer should be \$\\frac{30}{X} \\Omega\$, where \$X\$ is JEE Main 2025 (Online) 23rd January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-galvanometer-having-a-coil-of-resistance-30-omega-ne-jee-main-physics-units-and-measurements-0ydiyrg6rkcjjrmq)
[29 JEE Main 2025 (Online) 23rd January Morning Shift](https://questions.examside.com/past-years/jee/question/pconsider-a-moving-coil-galvanomenter-mcgp-pa-the-jee-main-physics-units-and-measurements-yujrubnnqc9fcx4f)
[30 JEE Main 2025 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements-p-pstatement-i--the-jee-main-physics-units-and-measurements-qw3yoouvvyp9sida)
[31 Which of the following resistivity ( \$\\rho\$ ) \$\\mathrm{v} / \\mathrm{s}\$ temperature ( T ) curves is most suitable to be used in wire bound standard resistors? JEE Main 2025 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/pwhich-of-the-following-resistivity--rho--mathrmv-jee-main-physics-units-and-measurements-r2cuek6ycczqfqat)
[32 JEE Main 2025 (Online) 22nd January Morning Shift](https://questions.examside.com/past-years/jee/question/pimg-srchttpsapp-contentfly-assetsukflywidthim-jee-main-physics-units-and-measurements-cy00y43w6yx4how4)
[33 JEE Main 2024 (Online) 9th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-effective-resistance-between-a-and-b-if-resi-jee-main-physics-motion-eotuwpogjmz5exk8)
[34 A galvanometer has a coil of resistance \$\$200 \\Omega\$\$ with a full scale deflection at \$\$20 \\mu \\mathrm{A}\$\$. The value of resistance to be added to use it as an ammeter of range \$\$(0-20) \\mathrm{mA}\$\$ is : JEE Main 2024 (Online) 9th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-galvanmeter-has-a-coil-of-resistance-200-omega-wit-jee-main-physics-motion-7mozz7x52qzvkper)
[35 JEE Main 2024 (Online) 9th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-a-and-b-is-p-pim-jee-main-physics-motion-5zijddwiutq6k8vz)
[36 Water boils in an electric kettle in 20 minutes after being switched on. Using the same main supply, the length of the heating element should be \_\_\_\_\_\_\_\_\_ to \_\_\_\_\_\_\_\_\_\_ times of its initial length if the water is to be boiled in 15 minutes. JEE Main 2024 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pwater-boils-in-an-electric-kettle-in-20-minutes-after-bei-jee-main-physics-motion-e9iwxzotyibpdgnt)
[37 JEE Main 2024 (Online) 8th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-terminal-potential-difference-o-jee-main-physics-motion-d3mzjdni1pnrtc9f)
[38 The number of electrons flowing per second in the filament of a \$\$110 \\mathrm{~W}\$\$ bulb operating at \$\$220 \\mathrm{~V}\$\$ is : (Given \$\$\\mathrm{e}=1.6 \\times 10^{-19} \\mathrm{C}\$\$) JEE Main 2024 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-number-of-electrons-flowing-per-second-in-the-filamen-jee-main-physics-motion-udcydeltssyteyhz)
[39 JEE Main 2024 (Online) 6th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-value-of-unknown-resistance-x-for-which-the-pot-jee-main-physics-motion-xs3dpbw7vqspmipu)
[40 JEE Main 2024 (Online) 5th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-ratio-of-heat-dissipated-per-second-through-the-resis-jee-main-physics-motion-fkr7duesqomze93m)
[41 A galvanometer of resistance \$\$100 \\Omega\$\$ when connected in series with \$\$400 \\Omega\$\$ measures a voltage of upto \$\$10 \\mathrm{~V}\$\$. The value of resistance required to convert the galvanometer into ammeter to read upto \$\$10 \\mathrm{~A}\$\$ is \$\$x \\times 10^{-2} \\Omega\$\$. The value of \$\$x\$\$ is : JEE Main 2024 (Online) 5th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-galvanometer-of-resistance-100-omega-when-connecte-jee-main-physics-motion-xiwbazezjdcwzfsx)
[42 JEE Main 2024 (Online) 5th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-mathrmr110-omega-mathrmr-jee-main-physics-motion-8ca5nxghxb14mkgc)
[43 An electric bulb rated \$\$50 \\mathrm{~W}-200 \\mathrm{~V}\$\$ is connected across a \$\$100 \\mathrm{~V}\$\$ supply. The power dissipation of the bulb is: JEE Main 2024 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/pan-electric-bulb-rated-50-mathrmw-200-mathrmv-jee-main-physics-motion-lovmhqewcurrfuur)
[44 To measure the internal resistance of a battery, potentiometer is used. For \$\$R=10 \\Omega\$\$, the balance point is observed at \$\$l=500 \\mathrm{~cm}\$\$ and for \$\$\\mathrm{R}=1 \\Omega\$\$ the balance point is observed at \$\$l=400 \\mathrm{~cm}\$\$. The internal resistance of the battery is approximately : JEE Main 2024 (Online) 4th April Morning Shift](https://questions.examside.com/past-years/jee/question/pto-measure-the-internal-resistance-of-a-battery-potentio-jee-main-physics-motion-3j943i9qwti5juib)
[45 In a metre-bridge when a resistance in the left gap is \$2 \\Omega\$ and unknown resistance in the right gap, the balance length is found to be \$40 \\mathrm{~cm}\$. On shunting the unknown resistance with \$2 \\Omega\$, the balance length changes by : JEE Main 2024 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/in-a-metre-bridge-when-a-resistance-in-the-left-gap-is-2-o-jee-main-physics-xi86efmngkm1ckcq)
[46 In an ammeter, \$5 \\%\$ of the main current passes through the galvanometer. If resistance of the galvanometer is \$\\mathrm{G}\$, the resistance of ammeter will be : JEE Main 2024 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/in-an-ammeter-5--of-the-main-current-passes-through-the-jee-main-physics-oqudivtfponufj4u)
[47 JEE Main 2024 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/the-reading-in-the-ideal-voltmeter-mathrmv-shown-in-t-jee-main-physics-j2uyrgs4kbwacju6)
[48 A galvanometer has a resistance of \$50 ~\\Omega\$ and it allows maximum current of \$5 \\mathrm{~mA}\$. It can be converted into voltmeter to measure upto \$100 \\mathrm{~V}\$ by connecting in series a resistor of resistance : JEE Main 2024 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/a-galvanometer-has-a-resistance-of-50-omega-and-it-allow-jee-main-physics-j1z35fjkdofhg5br)
[49 By what percentage will the illumination of the lamp decrease if the current drops by 20%? JEE Main 2024 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/pby-what-percentage-will-the-illumination-of-the-lamp-decr-jee-main-physics-motion-ji9ehdxxmh6at9o2)
[50 The resistance per centimeter of a meter bridge wire is \$\$r\$\$, with \$\$X \\Omega\$\$ resistance in left gap. Balancing length from left end is at \$\$40 \\mathrm{~cm}\$\$ with \$\$25 \\Omega\$\$ resistance in right gap. Now the wire is replaced by another wire of \$\$2 r\$\$ resistance per centimeter. The new balancing length for same settings will be at JEE Main 2024 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-resistance-per-centimeter-of-a-meter-bridge-wire-is--jee-main-physics-motion-4i2sfqzcizwsbqgp)
[51 Two conductors have the same resistances at \$\$0^{\\circ} \\mathrm{C}\$\$ but their temperature coefficients of resistance are \$\$\\alpha\_1\$\$ and \$\$\\alpha\_2\$\$. The respective temperature coefficients for their series and parallel combinations are : JEE Main 2024 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-conductors-have-the-same-resistances-at-0circ--jee-main-physics-motion-lwcvgfyt5nmlsdh8)
[52 When a potential difference \$\$V\$\$ is applied across a wire of resistance \$\$R\$\$, it dissipates energy at a rate \$\$W\$\$. If the wire is cut into two halves and these halves are connected mutually parallel across the same supply, the energy dissipation rate will become: JEE Main 2024 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwhen-a-potential-difference-v-is-applied-across-a-wir-jee-main-physics-motion-ui5wl4tcqagtk3w7)
[53 JEE Main 2024 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-potential-divider-circuit-is-shown-in-figure-the-outpu-jee-main-physics-motion-ljob4mt7feaqevbn)
[54 An electric toaster has resistance of \$\$60 \\Omega\$\$ at room temperature \$\$\\left(27^{\\circ} \\mathrm{C}\\right)\$\$. The toaster is connected to a \$\$220 \\mathrm{~V}\$\$ supply. If the current flowing through it reaches \$\$2.75 \\mathrm{~A}\$\$, the temperature attained by toaster is around : ( if \$\$\\alpha=2 \\times 10^{-4}\$\$/\$\$^\\circ \\mathrm{C}\$\$) JEE Main 2024 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pan-electric-toaster-has-resistance-of-60-omega-at-ro-jee-main-physics-motion-zlmjh2fpdrytdrjo)
[55 JEE Main 2024 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-current-in-resistance-r3-i-jee-main-physics-motion-98uzsofpc50dumfu)
[56 The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of \$\$24 \\Omega\$\$ is applied. The resistance of galvanometer coil will be : JEE Main 2024 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-deflection-in-moving-coil-galvanometer-falls-from-25-jee-main-physics-units-and-measurements-vvfhpxm3dpp6ucr7)
[57 A galvanometer having coil resistance \$\$10 \\Omega\$\$ shows a full scale deflection for a current of \$\$3 \\mathrm{~mA}\$\$. For it to measure a current of \$\$8 \\mathrm{~A}\$\$, the value of the shunt should be: JEE Main 2024 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-galvanometer-having-coil-resistance-10-omega-shows-jee-main-physics-units-and-measurements-j2mbaw1eixfitpxz)
[58 The electric current through a wire varies with time as \$\$I=I\_0+\\beta t\$\$, where \$\$I\_0=20 \\mathrm{~A}\$\$ and \$\$\\beta=3 \\mathrm{~A} / \\mathrm{s}\$\$. The amount of electric charge crossed through a section of the wire in \$\$20 \\mathrm{~s}\$\$ is : JEE Main 2024 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-electric-current-through-a-wire-varies-with-time-as--jee-main-physics-units-and-measurements-eeycnoem0wfugx8l)
[59 JEE Main 2024 (Online) 27th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthree-voltmeters-all-having-different-internal-resistanc-jee-main-physics-motion-xfyola8b8edhchio)
[60 A current of \$\$200 \\mu \\mathrm{A}\$\$ deflects the coil of a moving coil galvanometer through \$\$60^{\\circ}\$\$. The current to cause deflection through \$\$\\frac{\\pi}{10}\$\$ radian is : JEE Main 2024 (Online) 27th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-current-of-200-mu-mathrma-deflects-the-coil-of-jee-main-physics-motion-tcxutifzp30zsgol)
[61 Wheatstone bridge principle is used to measure the specific resistance \$\$\\left(S\_1\\right)\$\$ of given wire, having length \$\$L\$\$, radius \$\$r\$\$. If \$\$X\$\$ is the resistance of wire, then specific resistance is ; \$\$S\_1=X\\left(\\frac{\\pi r^2}{L}\\right)\$\$. If the length of the wire gets doubled then the value of specific resistance will be : JEE Main 2024 (Online) 27th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwheatstone-bridge-principle-is-used-to-measure-the-specif-jee-main-physics-motion-izkl6bjzdvxzqtb4)
[62 A wire of length \$\$10 \\mathrm{~cm}\$\$ and radius \$\$\\sqrt{7} \\times 10^{-4} \\mathrm{~m}\$\$ connected across the right gap of a meter bridge. When a resistance of \$\$4.5 \\Omega\$\$ is connected on the left gap by using a resistance box, the balance length is found to be at \$\$60 \\mathrm{~cm}\$\$ from the left end. If the resistivity of the wire is \$\$\\mathrm{R} \\times 10^{-7} \\Omega \\mathrm{m}\$\$, then value of \$\$\\mathrm{R}\$\$ is : JEE Main 2024 (Online) 27th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-length-10-mathrmcm-and-radius-sqrt7-jee-main-physics-motion-2ny0iy4vd8kmwolu)
[63 A wire of resistance \$\$\\mathrm{R}\$\$ and length \$\$\\mathrm{L}\$\$ is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be : JEE Main 2024 (Online) 27th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-mathrmr-and-length-mathrm-jee-main-physics-motion-t9yn7pwpss5mrcxa)
[64 JEE Main 2023 (Online) 15th April Morning Shift](https://questions.examside.com/past-years/jee/question/for-designing-a-voltmeter-of-range-50-mathrmv-and-an-a-jee-main-physics-g0ik1xpvzgtwfwen)
[65 JEE Main 2023 (Online) 15th April Morning Shift](https://questions.examside.com/past-years/jee/question/given-below-are-two-statements-brbr-bstatement-ib-jee-main-physics-bnyzqhziozs4s7y7)
[66 JEE Main 2023 (Online) 13th April Morning Shift](https://questions.examside.com/past-years/jee/question/pdifferent-combination-of-3-resistors-of-equal-resistance-jee-main-physics-motion-odskdilh8wopluth)
[67 A wire of resistance \$\$160 ~\\Omega\$\$ is melted and drawn in a wire of one-fourth of its length. The new resistance of the wire will be JEE Main 2023 (Online) 12th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-160-omega-is-melted-and-drawn-jee-main-physics-motion-ejxnxanymcqyvju9)
[68 JEE Main 2023 (Online) 11th April Evening Shift](https://questions.examside.com/past-years/jee/question/pimagep-pthe-current-flowing-through-r2-is-p-jee-main-physics-motion-yvp1kytmybbzivn9)
[69 Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in same time for parallel to series will be: JEE Main 2023 (Online) 11th April Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-heater-filaments-are-connected-first-in-par-jee-main-physics-motion-ohrgvllxtfw9mcve)
[70 The current sensitivity of moving coil galvanometer is increased by \$\$25 \\%\$\$. This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be: JEE Main 2023 (Online) 11th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-sensitivity-of-moving-coil-galvanometer-is-in-jee-main-physics-motion-i9sks4rwbymkmsfs)
[71 JEE Main 2023 (Online) 10th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-of-the-circuit-shown-below-betw-jee-main-physics-motion-j8qtoeolyws5rv6z)
[72 JEE Main 2023 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-a-and-b-as-shown-in-fig-jee-main-physics-motion-vnugfxdlgemlulqx)
[73 JEE Main 2023 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pfigure-shows-a-part-of-an-electric-circuit-the-potential-jee-main-physics-motion-j8iy7mvepsraihzw)
[74 A student is provided with a variable voltage source \$\$\\mathrm{V}\$\$, a test resistor \$\$R\_{T}=10 ~\\Omega\$\$, two identical galvanometers \$\$G\_{1}\$\$ and \$\$G\_{2}\$\$ and two additional resistors, \$\$R\_{1}=10 ~M \\Omega\$\$ and \$\$R\_{2}=0.001 ~\\Omega\$\$. For conducting an experiment to verify ohm's law, the most suitable circuit is: JEE Main 2023 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-student-is-provided-with-a-variable-voltage-source-m-jee-main-physics-motion-ha5vl87jrdi6bcxt)
[75 JEE Main 2023 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements--one-is-labelled-as-asser-jee-main-physics-motion-megqtumvvusr5r7b)
[76 Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be : JEE Main 2023 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/pequivalent-resistance-between-the-adjacent-corners-of-a-r-jee-main-physics-motion-mrmmsttnrfmpcelf)
[77 JEE Main 2023 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-a-and-b-of-the-jee-main-physics-motion-4ttr7n26jbqt58db)
[78 The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by \$50 \\%\$. The percentage change in voltage sensitivity of the galvanometer will be : JEE Main 2023 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/the-number-of-turns-of-the-coil-of-a-moving-coil-galvanomete-jee-main-physics-jjoe1prefqrjx0kw)
[79 The \$\\mathrm{H}\$ amount of thermal energy is developed by a resistor in \$10 \\mathrm{~s}\$ when a current of \$4 \\mathrm{~A}\$ is passed through it. If the current is increased to \$16 \\mathrm{~A}\$, the thermal energy developed by the resistor in \$10 \\mathrm{~s}\$ will be : JEE Main 2023 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/the-mathrmh-amount-of-thermal-energy-is-developed-by-a-jee-main-physics-qyvyhomgpneahjqu)
[80 The drift velocity of electrons for a conductor connected in an electrical circuit is \$\$\\mathrm{V}\_{\\mathrm{d}}\$\$. The conductor in now replaced by another conductor with same material and same length but double the area of cross section. The applied voltage remains same. The new drift velocity of electrons will be JEE Main 2023 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-drift-velocity-of-electrons-for-a-conductor-connected-jee-main-physics-motion-imbilgxqhk1pckee)
[81 JEE Main 2023 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/the-equivalent-resistance-between-a-and-b-is--jee-main-physics-mhcgqzj6ynh8bwkx)
[82 The charge flowing in a conductor changes with time as \$\$\\mathrm{Q}(\\mathrm{t})=\\alpha \\mathrm{t}-\\beta \\mathrm{t}^{2}+\\gamma \\mathrm{t}^{3}\$\$. Where \$\$\\alpha, \\beta\$\$ and \$\$\\gamma\$\$ are constants. Minimum value of current is : JEE Main 2023 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-charge-flowing-in-a-conductor-changes-with-time-as--jee-main-physics-motion-l8tuoqnc8bteo1ek)
[83 JEE Main 2023 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwith-the-help-of-potentiometer-we-can-determine-the-valu-jee-main-physics-motion-iqictnrfbocj912h)
[84 Ratio of thermal energy released in two resistors R and 3R connected in parallel in an electric circuit is : JEE Main 2023 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pratio-of-thermal-energy-released-in-two-resistors-r-and-3-jee-main-physics-motion-nxninn9a3pmvlyeg)
[85 The resistance of a wire is 5 \$\$\\Omega\$\$. It's new resistance in ohm if stretched to 5 times of it's original length will be : JEE Main 2023 (Online) 25th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-resistance-of-a-wire-is-5-omega-its-new-resist-jee-main-physics-motion-rddrrr6a1pb9gxvf)
[86 A uniform metallic wire carries a current 2 A, when 3.4 V battery is connected across it. The mass of uniform metallic wire is 8.92 \$\$\\times\$\$ 10\$\$^{-3}\$\$ kg, density is 8.92 \$\$\\times\$\$ 10\$\$^{3}\$\$ kg/m\$\$^3\$\$ and resistivity is 1.7 \$\$\\times\$\$ 10\$\$^{-8}~\\Omega\$\$-\$\$\\mathrm{m}\$\$. The length of wire is : JEE Main 2023 (Online) 25th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-uniform-metallic-wire-carries-a-current-2-a-when-34-v-jee-main-physics-motion-cv62nsibx378kmrc)
[87 A cell of emf 90 V is connected across series combination of two resistors each of 100\$\$\\Omega\$\$ resistance. A voltmeter of resistance 400\$\$\\Omega\$\$ is used to measure the potential difference across each resistor. The reading of the voltmeter will be : JEE Main 2023 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-cell-of-emf-90-v-is-connected-across-sides-combination-jee-main-physics-motion-l6x58zy6pfxmcgd8)
[88 JEE Main 2023 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/pas-shown-in-the-figure-a-network-of-resistors-is-connect-jee-main-physics-motion-txwdwv5suoarjcf6)
[89 JEE Main 2022 (Online) 29th July Evening Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements-one-is-labelled-as-assert-jee-main-physics-motion-nlwtbdy32ruqeva8)
[90 A \$\$1 \\mathrm{~m}\$\$ long wire is broken into two unequal parts \$\$\\mathrm{X}\$\$ and \$\$\\mathrm{Y}\$\$. The \$\$\\mathrm{X}\$\$ part of the wire is streched into another wire W. Length of \$\$W\$\$ is twice the length of \$\$X\$\$ and the resistance of \$\$\\mathrm{W}\$\$ is twice that of \$\$\\mathrm{Y}\$\$. Find the ratio of length of \$\$\\mathrm{X}\$\$ and \$\$\\mathrm{Y}\$\$. JEE Main 2022 (Online) 29th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-1-mathrmm-long-wire-is-broken-into-two-unequal-jee-main-physics-motion-cifuriygzxqetloz)
[91 Two metallic wires of identical dimensions are connected in series. If \$\$\\sigma\_{1}\$\$ and \$\$\\sigma\_{2}\$\$ are the conductivities of the these wires respectively, the effective conductivity of the combination is : JEE Main 2022 (Online) 29th July Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-metallic-wires-of-identical-dimensions-are-connected-jee-main-physics-motion-ai3qhqeh0x7w8zfw)
[92 JEE Main 2022 (Online) 28th July Evening Shift](https://questions.examside.com/past-years/jee/question/pgiven-below-are-two-statements-p-pstatement-i--a-u-jee-main-physics-motion-6h5qfx1wbzmpqbgp)
[93 A wire of resistance R1 is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is : JEE Main 2022 (Online) 28th July Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-rsub1sub-is-drawn-out-so-that-i-jee-main-physics-motion-nklmnvn2lyc9cknr)
[94 JEE Main 2022 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-the-drift-velocity-of-electrons-decreases-with-the-in-jee-main-physics-motion-kwpslcozxhamfvnq)
[95 Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The internal resistances of the two sources are \$\$r\_{1}\$\$ and \$\$r\_{2}\$\$ \$\$\\left(r\_{1}\>r\_{2}\\right)\$\$. If the potential difference across the source of internal resistance \$\$r\_{1}\$\$ is zero, then the value of R will be : JEE Main 2022 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-sources-of-equal-emfs-are-connected-in-series-this-c-jee-main-physics-motion-pgv9ttcmkrhxq9uo)
[96 JEE Main 2022 (Online) 26th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-battery-of-6-mathrmv-is-connected-to-the-circui-jee-main-physics-motion-b83tuc3wsnyc0hpb)
[97 JEE Main 2022 (Online) 26th July Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-i-in-the-given-circuit-will-be-p-pimage-jee-main-physics-motion-wd7f4agvxb87glh6)
[98 JEE Main 2022 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-current-of-15-ma-flows-in-the-circuit-as-shown-in-figur-jee-main-physics-motion-x7rd8s7vr3favcvr)
[99 Which of the following physical quantities have the same dimensions? JEE Main 2022 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/pwhich-of-the-following-physical-quantities-have-the-same-jee-main-physics-motion-zqmlzzximnqiu4wa)
[100 An electric cable of copper has just one wire of radius 9 mm. Its resistance is 14 \$\$\\Omega\$\$. If this single copper wire of the cable is replaced by seven identical well insulated copper wires each of radius 3 mm connected in parallel, then the new resistance of the combination will be : JEE Main 2022 (Online) 30th June Morning Shift](https://questions.examside.com/past-years/jee/question/pan-electric-cable-of-copper-has-just-one-wire-of-radius-9-jee-main-physics-motion-jjj0ytlz5qr8zyhc)
[101 The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of 2\$\$\\Omega\$\$. The value of internal resistance of each cell is JEE Main 2022 (Online) 29th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-combination-of-two-identical-cells-whether-connected-jee-main-physics-motion-dsy7ehfthpnq3q3x)
[102 Resistance of the wire is measured as 2 \$\$\\Omega\$\$ and 3 \$\$\\Omega\$\$ at 10\$\$^\\circ\$\$C and 30\$\$^\\circ\$\$C respectively. Temperature co-efficient of resistance of the material of the wire is : JEE Main 2022 (Online) 28th June Evening Shift](https://questions.examside.com/past-years/jee/question/presistance-of-the-wire-is-measured-as-2-omega-and-3-jee-main-physics-motion-dtdtff3jwacwt8do)
[103 A 72 \$\$\\Omega\$\$ galvanometer is shunted by a resistance of 8 \$\$\\Omega\$\$. The percentage of the total current which passes through the galvanometer is : JEE Main 2022 (Online) 27th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-72-omega-galvanometer-is-shunted-by-a-resistance-o-jee-main-physics-motion-sq2phkcaxinz4yhh)
[104 JEE Main 2022 (Online) 26th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-points-a-and-b-in-the-g-jee-main-physics-motion-gtdaqnfbevujrsjw)
[105 An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is : JEE Main 2022 (Online) 26th June Morning Shift](https://questions.examside.com/past-years/jee/question/pan-aluminium-wire-is-stretched-to-make-its-length-04-l-jee-main-physics-motion-l8wgeuazqvqk3vke)
[106 Two cells of same emf but different internal resistances r1 and r2 are connected in series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, is : JEE Main 2022 (Online) 25th June Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-of-same-emf-but-different-internal-resistances-jee-main-physics-motion-qoewe9ii1qym1apk)
[107 If n represents the actual number of deflections in a converted galvanometer of resistance G and shunt resistance S. Then the total current I when its figure of merit is K will be: JEE Main 2022 (Online) 25th June Evening Shift](https://questions.examside.com/past-years/jee/question/pif-n-represents-the-actual-number-of-deflections-in-a-con-jee-main-physics-motion-deb8pspl5vsvftlr)
[108 A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for \$\${1 \\over 3}\$\$ deflection in the galvanometer. Which of the below is true for measuring value of G? JEE Main 2022 (Online) 25th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-teacher-in-his-physics-laboratory-allotted-an-experimen-jee-main-physics-motion-qtapwebhj36mj47h)
[109 What will be the most suitable combination of three resistors A = 2\$\$\\Omega\$\$, B = 4\$\$\\Omega\$\$, C = 6\$\$\\Omega\$\$ so that \$\$\\left( {{{22} \\over 3}} \\right)\$\$\$\$\\Omega\$\$ is equivalent resistance of combination? JEE Main 2022 (Online) 24th June Evening Shift](https://questions.examside.com/past-years/jee/question/pwhat-will-be-the-most-suitable-combination-of-three-resis-jee-main-physics-motion-fsihrsukaackc0dq)
[110 Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each of resistance 20 \$\$\\Omega\$\$. A voltmeter connected in the circuit measures 1.2 V. The internal resistance of each cell is : JEE Main 2022 (Online) 24th June Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-cells-each-of-emf-15-v-are-connected-in-pa-jee-main-physics-motion-ayqdxjl7l8lqz6ak)
[111 Due to cold weather a 1 m water pipe of cross-sectional area 1 cm2 is filled with ice at \$\$-\$\$10\$\$^\\circ\$\$C. Resistive heating is used to melt the ice. Current of 0.5A is passed through 4 k\$\$\\Omega\$\$ resistance. Assuming that all the heat produced is used for melting, what is the minimum time required? (Given latent heat of fusion for water/ice = 3.33 \$\$\\times\$\$ 105 J kg\$\$-\$\$1, specific heat of ice = 2 \$\$\\times\$\$ 103 J kg\$\$-\$\$1 and density of ice = 103 kg/m3 JEE Main 2021 (Online) 1st September Evening Shift](https://questions.examside.com/past-years/jee/question/due-to-cold-weather-a-1-m-water-pipe-of-cross-sectional-area-jee-main-physics-units-and-measurements-owy8suqd4h6mvqww)
[112 Two resistors R1 = (4 \$\$\\pm\$\$ 0.8) \$\$\\Omega\$\$ and R2 = (4 \$\$\\pm\$\$ 0.4) \$\$\\Omega\$\$ are connected in parallel. The equivalent resistance of their parallel combination will be : JEE Main 2021 (Online) 1st September Evening Shift](https://questions.examside.com/past-years/jee/question/two-resistors-rsub1sub--4-pm-08-omega-and-jee-main-physics-units-and-measurements-9a7zordge1j2k9uy)
[113 JEE Main 2021 (Online) 31st August Evening Shift](https://questions.examside.com/past-years/jee/question/the-equivalent-resistance-of-the-given-circuit-between-the-t-jee-main-physics-units-and-measurements-c70amnntnqzeeuyf)
[114 Consider a galvanometer shunted with 5\$\$\\Omega\$\$ resistance and 2% of current passes through it. What is the resistance of the given galvanometer ? JEE Main 2021 (Online) 31st August Morning Shift](https://questions.examside.com/past-years/jee/question/consider-a-galvanometer-shunted-with-5omega-resistance-jee-main-physics-units-and-measurements-e0djld8vbm1o5udl)
[115 JEE Main 2021 (Online) 27th August Evening Shift](https://questions.examside.com/past-years/jee/question/the-colour-coding-on-a-carbon-resistor-is-shown-in-the-given-jee-main-physics-units-and-measurements-izvssqh7hxchvtlv)
[116 For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanometer if its current sensitivity is 2 div/mA will be : JEE Main 2021 (Online) 27th August Evening Shift](https://questions.examside.com/past-years/jee/question/for-full-scale-deflection-of-total-50-divisions-50-mv-volta-jee-main-physics-units-and-measurements-hxyqbrrs1oxm4jfs)
[117 Five identical cells each of internal resistance 1\$\$\\Omega\$\$ and emf 5V are connected in series and in parallel with an external resistance 'R'. For what value of 'R', current in series and parallel combination will remain the same? JEE Main 2021 (Online) 27th August Morning Shift](https://questions.examside.com/past-years/jee/question/five-identical-cells-each-of-internal-resistance-1omega-jee-main-physics-units-and-measurements-bgy8jildso6ym1rs)
[118 If you are provided a set of resistances 2\$\$\\Omega\$\$, 4\$\$\\Omega\$\$, 6\$\$\\Omega\$\$ and 8\$\$\\Omega\$\$. Connect these resistances so as to obtain an equivalent resistance of \$\${{46} \\over 3}\$\$\$\$\\Omega\$\$. JEE Main 2021 (Online) 26th August Evening Shift](https://questions.examside.com/past-years/jee/question/if-you-are-provided-a-set-of-resistances-2omega-4om-jee-main-physics-units-and-measurements-1e4twhgqbvyy6gxh)
[119 An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W. JEE Main 2021 (Online) 26th August Evening Shift](https://questions.examside.com/past-years/jee/question/an-electric-bulb-of-500-watt-at-100-volt-is-used-in-a-circui-jee-main-physics-units-and-measurements-zdjcp6arvczlf7h9)
[120 In the given figure, the emf of the cell is 2.2 V and if internal resistance is 0.6\$\$\\Omega\$\$. Calculate the power dissipated in the whole circuit :  JEE Main 2021 (Online) 26th August Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-the-emf-of-the-cell-is-22-v-and-if-int-jee-main-physics-units-and-measurements-mab4s59mtsu6wsxf)
[121 JEE Main 2021 (Online) 26th August Morning Shift](https://questions.examside.com/past-years/jee/question/what-equal-length-of-an-iron-wire-and-a-copper-nickel-alloy-jee-main-physics-units-and-measurements-njp5zzym04xrxort)
[122 The resistance of a conductor at 15\$\$^\\circ\$\$C is 16\$\$\\Omega\$\$ and at 100\$\$^\\circ\$\$C is 20\$\$\\Omega\$\$. What will be the temperature coefficient of resistance of the conductor? JEE Main 2021 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/the-resistance-of-a-conductor-at-15circc-is-16omega-jee-main-physics-units-and-measurements-iysmj69re77jvr0j)
[123 JEE Main 2021 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-a-battery-of-emf-e-is-connected-across-jee-main-physics-units-and-measurements-14ctriy8ymd9uvu6)
[124 JEE Main 2021 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/in-the-given-potentiometer-circuit-arrangement-the-balancin-jee-main-physics-units-and-measurements-updgorgrfvy0davz)
[125 JEE Main 2021 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/the-given-potentiometer-has-its-wire-of-resistance-10omeg-jee-main-physics-units-and-measurements-vdzpzcvmehruwdvy)
[126 JEE Main 2021 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-there-is-a-circuit-of-potentiometer-of-jee-main-physics-units-and-measurements-aqrbnx6pm99dzzp7)
[127 JEE Main 2021 (Online) 22th July Evening Shift](https://questions.examside.com/past-years/jee/question/a-copper-cu-rod-of-length-25-cm-and-cross-sectional-area-3-jee-main-physics-units-and-measurements-dl0nc8klmfawpuxu)
[128 JEE Main 2021 (Online) 20th July Morning Shift](https://questions.examside.com/past-years/jee/question/a-current-of-5-a-is-passing-through-a-non-linear-magnesium-w-jee-main-physics-units-and-measurements-nsilsqyqxihrgdte)
[129  The value of current in the 6 \$\$\\Omega\$\$ resistance is : JEE Main 2021 (Online) 20th July Morning Shift](https://questions.examside.com/past-years/jee/question/imagebrbrthe-value-of-current-in-the-6-omega-resi-jee-main-physics-units-and-measurements-we593jgnjk8j9tec)
[130 In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 cm and diameter of 5.00 mm. The measured current in the conductor is 2.00 A. The maximum permissible percentage error in the resistivity of the conductor is : JEE Main 2021 (Online) 18th March Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-experiment-of-ohms-law-a-potential-difference-of-5-jee-main-physics-units-and-measurements-sdq55yopsoqadw0q)
[131 JEE Main 2021 (Online) 17th March Evening Shift](https://questions.examside.com/past-years/jee/question/two-cells-of-emf-2e-and-e-with-internal-resistance-rsub1-jee-main-physics-units-and-measurements-bpot0dx0exrkkxki)
[132 JEE Main 2021 (Online) 17th March Evening Shift](https://questions.examside.com/past-years/jee/question/the-four-arms-of-a-wheatstone-bridge-have-resistances-as-sho-jee-main-physics-units-and-measurements-9akckfsx4ija2nng)
[133 A current of 10A exists in a wire of cross-sectional area of 5 mm2 with a drift velocity of 2 \$\$\\times\$\$ 10\$\$-\$\$3 ms\$\$-\$\$1. The number of free electrons in each cubic meter of the wire is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 17th March Morning Shift](https://questions.examside.com/past-years/jee/question/a-current-of-10a-exists-in-a-wire-of-cross-sectional-area-of-jee-main-physics-units-and-measurements-btcok19roouvbdo9)
[134 A resistor develops 500 J of thermal energy in 20 s when a current of 1.5A is passed through it. If the current is increased from 1.5A to 3A, what will be the energy developed in 20 s. JEE Main 2021 (Online) 16th March Evening Shift](https://questions.examside.com/past-years/jee/question/a-resistor-develops-500-j-of-thermal-energy-in-20-s-when-a-c-jee-main-physics-units-and-measurements-9kker2ggxwxdftjr)
[135 JEE Main 2021 (Online) 16th March Morning Shift](https://questions.examside.com/past-years/jee/question/a-conducting-wire-of-length-l-area-of-cross-section-a-and-jee-main-physics-units-and-measurements-ixmhddaubjrbs9rk)
[136 A wire of 1\$\$\\Omega\$\$ has a length of 1 m. It is stretched till its length increases by 25%. The percentage change in resistance to the nearest integer is : JEE Main 2021 (Online) 26th February Evening Shift](https://questions.examside.com/past-years/jee/question/a-wire-of-1omega-has-a-length-of-1-m-it-is-stretched-t-jee-main-physics-units-and-measurements-qsrcvbgklm6mruse)
[137 JEE Main 2021 (Online) 26th February Morning Shift](https://questions.examside.com/past-years/jee/question/five-equal-resistances-are-connected-in-a-network-as-shown-i-jee-main-physics-units-and-measurements-l0ajx2a250rfjjeo)
[138 JEE Main 2021 (Online) 24th February Morning Shift](https://questions.examside.com/past-years/jee/question/a-current-through-a-wire-depends-on-time-as-brbri---jee-main-physics-units-and-measurements-5hhtmt0plo2sioec)
[139 JEE Main 2021 (Online) 24th February Morning Shift](https://questions.examside.com/past-years/jee/question/a-cell-esub1sub-of-emf-6v-and-internal-resistance-2o-jee-main-physics-units-and-measurements-82spygavyb8nxs6z)
[140 A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit : JEE Main 2020 (Online) 6th September Evening Slot](https://questions.examside.com/past-years/jee/question/a-circuit-to-verify-ohms-law-uses-ammeter-and-voltmeter-in-jee-main-physics-current-electricity-gzfboi375uvcqvok)
[141 JEE Main 2020 (Online) 6th September Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-figure-shown-the-current-in-the-10-v-battery-is-clos-jee-main-physics-current-electricity-oydwmw4lbydxrpgx)
[142 In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is :  JEE Main 2020 (Online) 5th September Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-circuit-given-in-the-figure-currents-in-different-br-jee-main-physics-current-electricity-wntc3vmwgki8t16d)
[143 A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of 6 mA it produces a deflection of 2o, its figure of merit is close to : JEE Main 2020 (Online) 5th September Evening Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-is-used-in-laboratory-for-detecting-the-null-jee-main-physics-magnetics-vwidjijg8ilvpbjg)
[144 An electrical power line, having a total resistance of 2 \$\$\\Omega \$\$, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately : JEE Main 2020 (Online) 5th September Morning Slot](https://questions.examside.com/past-years/jee/question/an-electrical-power-line-having-a-total-resistance-of-2--jee-main-physics-current-electricity-m6qe4h6l6vhqsbwt)
[145 A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance R1 in series with it. The additional resistance that should be connected in series with R1 to increase the range of the voltmeter to 0 – 2 V will be : JEE Main 2020 (Online) 5th September Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-of-resistance-g-is-converted-into-a-voltmeter-jee-main-physics-current-electricity-cqdqdskvz9t0ibnz)
[146 The value of current i1 flowing from A to C in the circuit diagram is :  JEE Main 2020 (Online) 4th September Evening Slot](https://questions.examside.com/past-years/jee/question/the-value-of-current-isub1sub-flowing-from-a-to-c-in-t-jee-main-physics-current-electricity-rezeavu8d8vcmooi)
[147 A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is : JEE Main 2020 (Online) 4th September Morning Slot](https://questions.examside.com/past-years/jee/question/a-battery-of-30-v-is-connected-to-a-resistor-dissipating-0-jee-main-physics-current-electricity-mwq9wlnwtpvu7w6g)
[148 Two resistors 400\$\$\\Omega \$\$ and 800\$\$\\Omega \$\$ are connected in series across a 6 V battery. The potential difference measured by a voltmeter of 10 k\$\$\\Omega \$\$ across 400 \$\$\\Omega \$\$ resistor is close to : JEE Main 2020 (Online) 3rd September Evening Slot](https://questions.examside.com/past-years/jee/question/two-resistors-400omega--and-800omega--are-connect-jee-main-physics-current-electricity-ltuoolbgvdvkwky5)
[149 Model a torch battery of length \$\$l\$\$ to be made up of a thin cylindrical bar of radius ‘a’ and a concentric thin cylindrical shell of radius ‘b’ filled in between with an electrolyte of resistivity \$\$\\rho \$\$ (see figure). If the battery is connected to a resistance of value R, the maximum Joule heating in R will take place for :  JEE Main 2020 (Online) 3rd September Morning Slot](https://questions.examside.com/past-years/jee/question/model-a-torch-battery-of-length-l-to-be-made-up-of-a-th-jee-main-physics-current-electricity-d0grb6cevtw00sla)
[150 A potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected with a resistance ‘r’ and switch S (as shown in figure). With switch S open, the null position is obtained at a distance of 49 cm from Q. The potential gradient in the potentiometer wire is :  JEE Main 2020 (Online) 2nd September Evening Slot](https://questions.examside.com/past-years/jee/question/a-potentiometer-wire-pq-of-1-m-length-is-connected-to-a-stan-jee-main-physics-current-electricity-9iq2o4yiwzo2phz1)
[151 Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity \$\$\\rho \$\$C, \$\$\\rho \$\$T, \$\$\\rho \$\$M and \$\$\\rho \$\$A respectively. Then : JEE Main 2020 (Online) 2nd September Morning Slot](https://questions.examside.com/past-years/jee/question/consider-four-conducting-materials-copper-tungsten-mercury-jee-main-physics-current-electricity-ho41sgpoubcycmx9)
[152 In the given circuit diagram, a wire is joining points B and D. The current in this wire is :  JEE Main 2020 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-diagram-a-wire-is-joining-points-b-and-jee-main-physics-current-electricity-jzyvxldk2mzusdai)
[153 A galvanometer having a coil resistance 100 \$\$\\Omega \$\$ gives a full scale deflection when a current of 1 mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 10 V? JEE Main 2020 (Online) 8th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-having-a-coil-resistance-100-omega--give-jee-main-physics-current-electricity-dydykrta0map7ymc)
[154 The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA. For a cell of emf 5V and internal resistance of 20\$\$\\Omega \$\$, the null point on it is found to be a 1000 cm. The resistance of whole wire is : JEE Main 2020 (Online) 8th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-length-of-a-potentiometer-wire-is-1200-cm-and-it-carries-jee-main-physics-current-electricity-nfskqrhdleozvbuk)
[155 In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10 W and 2 heaters of 1 kW. The voltage of electric main is 220 V. The minimum fuse capacity (rated value) of the building will be : JEE Main 2020 (Online) 7th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-a-building-there-are-15-bulbs-of-45-w-15-bulbs-of-100-w-jee-main-physics-current-electricity-psz9ayi1hovm57ds)
[156 The current I1 (in A) flowing through 1 \$\$\\Omega \$\$ resistor in the following circuit is :  JEE Main 2020 (Online) 7th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-current-isub1sub-in-a-flowing-through-1-omega-jee-main-physics-current-electricity-qlqalcesxiyrkgf1)
[157 A moving coil galvanometer, having a resistance G, produces full scale deflection when a current Ig flows through it. This galvanometer can be converted into (i) an ammeter of range 0 to I0(I0 \> Ig) by connecting a shunt resistance RA to it and (ii) into a voltmeter of range 0 to V (V = GI0) by connecting a series resistance RV to it. Then, JEE Main 2019 (Online) 12th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-having-a-resistance-g-produces-jee-main-physics-electrostatics-a26lp2ocaroft3tp)
[158 The resistive network shown below is connected to a D.C. source of 16 V. The power consumed by the network is 4 Watt. The value of R is:  JEE Main 2019 (Online) 12th April Morning Slot](https://questions.examside.com/past-years/jee/question/the-resistive-network-shown-below-is-connected-to-a-dc-sou-jee-main-physics-current-electricity-n1ir8od7q7hkjqe1)
[159 A galvanometer of resistance 100 \$\$\\Omega \$\$ has 50 divisions on its scale and has sensitivitv of 20 \$\$\\mu \$\$A/division. It is to be converted to a voltmeter with three ranges of 0-2V, 0-10 V and 0-20 V. The appropriate circuit to do so is JEE Main 2019 (Online) 12th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-of-resistance-100-omega--has-50-division-jee-main-physics-current-electricity-uojkeeb761cnlltx)
[160 To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. The measured voltage is plotted as a function of the current, and the following graph is obtained :  If V0 is almost zero, identify the correct statement : JEE Main 2019 (Online) 12th April Morning Slot](https://questions.examside.com/past-years/jee/question/to-verify-ohms-law-a-student-connects-the-voltmeter-across-jee-main-physics-electrostatics-mipfflzns00uq1va)
[161 Space between two concentric conducting spheres of radii a and b (b \> a) is filled with a medium of resistivity \$\$\\rho \$\$. The resistance between the two spheres will be : JEE Main 2019 (Online) 10th April Evening Slot](https://questions.examside.com/past-years/jee/question/space-between-two-concentric-conducting-spheres-of-radii-a-a-jee-main-physics-electrostatics-ggnr6obtabzd9aqb)
[162 A current of 5 A passes through a copper conductor (resistivity = 1.7 × 10–8 \$\$\\Omega \$\$m) of radius of cross-section 5 mm. Find the mobility of the charges if their drift velocity is 1.1 × 10–3 m/s. JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-current-of-5-a-passes-through-a-copper-conductor-resistiv-jee-main-physics-units-and-measurements-ygnh5gypvgnk9ykk)
[163 In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure  SI. No. R(\$\$\\Omega \$\$) l(cm) 1. 1000 60 2. 100 13 3. 10 1.5 4. 1 1.0 Which of the readings is inconsistent? JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-the-circuit-diagram-and-the-co-jee-main-physics-units-and-measurements-zwqolmt4g0t9kdvw)
[164 In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown in the figure, it is a straight line. One may conclude that :  JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-an-experiment-the-resistance-of-a-material-is-plotted-as-jee-main-physics-units-and-measurements-mdpta08nnshlnsvd)
[165 A moving coil galvanometer allows a full scale current of 10–4 A. A series resistance of 2 M\$\$\\Omega \$\$ is required to convert the above galvanometer into a voltmeter of range 0-5 V. Therefore the value of shunt resistance required to convert the above galvanometer into an ammeter of range 0.10 mA is : JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-allows-a-full-scale-current-of-10-jee-main-physics-units-and-measurements-crry3oneft2zqdzo)
[166 In the given circuit, an ideal voltmeter connected across the 10\$\$\\Omega \$\$ resistance reads 2V. The internal resistance r, of each cell is:  JEE Main 2019 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-an-ideal-voltmeter-connected-across-th-jee-main-physics-units-and-measurements-lcc1qfpwcezp4jql)
[167 A metal wire of resistance 3 \$\$\\Omega \$\$ is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle 60° at the centre, the equivalent resistance between these two points will be :- JEE Main 2019 (Online) 9th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-metal-wire-of-resistance-3-omega-is-elongated-to-ma-jee-main-physics-units-and-measurements-gdcq17dn7lromrlx)
[168 The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resistance must be connected to it in order to convert it into an ammeter of range 0 – 0.5 A ? JEE Main 2019 (Online) 9th April Evening Slot](https://questions.examside.com/past-years/jee/question/the-resistance-of-a-galvanometer-is-50-ohm-and-the-maximum-c-jee-main-physics-units-and-measurements-tlix09kura2tzege)
[169 In a conductor, if the number of conduction electrons per unit volume is 8.5 × 1028 m–3 and mean free time is 25ƒs (femto second), it's approximate resistivity is :- (me = 9.1 × 10–31 kg) JEE Main 2019 (Online) 9th April Evening Slot](https://questions.examside.com/past-years/jee/question/in-a-conductor-if-the-number-of-conduction-electrons-per-un-jee-main-physics-units-and-measurements-qw0jo3vc5pu7ittq)
[170 A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is : (E is mid-point of arm CD)  JEE Main 2019 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-wire-of-resistance-r-is-bent-to-form-a-square-abcd-as-show-jee-main-physics-units-and-measurements-8rdybh20mc0qknut)
[171 A moving coil galvanometer has resistance 50\$\$\\Omega \$\$ and it indicates full deflection at 4mA current. A voltmeter is made using this galvanometer and a 5 k\$\$\\Omega \$\$ resistance. The maximum voltage, that can be measured using this voltmeter, will be close to : JEE Main 2019 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-has-resistance-50omega-and-jee-main-physics-units-and-measurements-llxdqgzllkyd0gyd)
[172 In the circuit shown, a four-wire potentiometer is made of a 400 cm long wire, which extends between A and B. The resistance per unit length of the potentiometer wire is r = 0.01 \$\$\\Omega \$\$/cm. If an ideal voltmeter is connected as shown with jockey J at 50 cm from end A, the expected reading of the voltmeter will be :-  JEE Main 2019 (Online) 8th April Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-circuit-shown-a-four-wire-potentiometer-is-made-of-a-jee-main-physics-units-and-measurements-l8vhvp28p60ikcqd)
[173 A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external resistance will be maximum when :- JEE Main 2019 (Online) 8th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-cell-of-internal-resistance-r-drives-current-through-an-ex-jee-main-physics-units-and-measurements-gjsdxxdfpcfzx16r)
[174 In the figure shown, what is the current (in Ampere) drawn from the battery ? You are given: R1 = 15\$\$\\Omega \$\$, R2 = 10 \$\$\\Omega \$\$, R3 = 20 \$\$\\Omega \$\$, R4 = 5\$\$\\Omega \$\$, R5 = 25\$\$\\Omega \$\$, R6 = 30 \$\$\\Omega \$\$, E = 15 V  JEE Main 2019 (Online) 8th April Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-figure-shown-what-is-the-current-in-ampere-drawn-f-jee-main-physics-units-and-measurements-bsj0kvjwe3tgvlfn)
[175 A 200 \$\$\\Omega \$\$ resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be : JEE Main 2019 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-registor-with-resistance-of-200-omega-has-one-of-its-jee-main-physics-current-electricity-bfmybps4cj7peejr)
[176 For the circuit shown, with R1 = 1.0W, R2 = 2.0 W, E1 = 2 V and E2 = E3 = 4 V, the potential difference between the points 'a' and 'b' is approximately (in V):  JEE Main 2019 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/for-the-circuit-shown-with-r1-10w-r2-20-w-e1-2-v-jee-main-physics-units-and-measurements-xy5kmmoeyxis4dyi)
[177 JEE Main 2019 (Online) 12th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-diagram-the-currents-i1-03-a-jee-main-physics-units-and-measurements-citnopsfgwa9qgpb)
[178 A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 \$\$ \\times \$\$ 10–4 A passes through it, its needle ( pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of : JEE Main 2019 (Online) 12th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-whose-resistance-is-50-ohm-has-25-divisions-jee-main-physics-units-and-measurements-yxlvvwpf1op7sxlt)
[179 JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-the-wire-of-length-1-m-has-a-non-uniform-jee-main-physics-units-and-measurements-awd4vlutsbnave6l)
[180 Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs draw powers P1 and P2 respectively, then : JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/two-electric-bulbs-rated-at-25-w-220-v-and-100-w-220-v-jee-main-physics-units-and-measurements-iyqrb3rsrqep7zix)
[181 JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-galvanometer-deflection-when-key-k1-is-closed-but-k2-is-jee-main-physics-units-and-measurements-x8dhiz40rhmt1wby)
[182 An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m and esistance 5 \$\$\\Omega \$\$. The value of R, to give a potential difference of 5 mV across 10 cm of potentiometer wire, is : JEE Main 2019 (Online) 12th January Morning Slot](https://questions.examside.com/past-years/jee/question/an-ideal-battery-of-4-v-and-resistance-r-are-connected-in-se-jee-main-physics-units-and-measurements-obshbbyleb7decwp)
[183 A galvanometer having a resistance of 20 \$\$\\Omega \$\$ and 30 divisions on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter upto 15 volt, is: JEE Main 2019 (Online) 11th January Evening Slot](https://questions.examside.com/past-years/jee/question/galvanometer-having-a-resistance-of-20-omega-and-30-di-jee-main-physics-units-and-measurements-vrbxv1no4bmyacrx)
[184 JEE Main 2019 (Online) 11th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-circuit-shown-the-potential-difference-between-a-and-jee-main-physics-units-and-measurements-8a92y2riwxofmhvr)
[185 JEE Main 2019 (Online) 11th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-experimental-set-up-of-metre-bridge-shown-in-the-figu-jee-main-physics-units-and-measurements-qrqseivyyyldxwjr)
[186 Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be : JEE Main 2019 (Online) 11th January Morning Slot](https://questions.examside.com/past-years/jee/question/two-equal-resistances-when-connected-in-series-to-a-battery-jee-main-physics-units-and-measurements-bv8b5o8jnjwlw5ft)
[187 JEE Main 2019 (Online) 11th January Morning Slot](https://questions.examside.com/past-years/jee/question/the-resistance-of-the-meter-bridge-ab-in-given-figure-is-4-jee-main-physics-units-and-measurements-5hnmhue1bkjlh8c3)
[188 JEE Main 2019 (Online) 11th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-wheatstone-bridgesee-fig-resistances-p-and-q-are-ap-jee-main-physics-units-and-measurements-bhwhojkwbsjgoggt)
[189 A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is - JEE Main 2019 (Online) 10th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-current-of-2-ma-was-passed-through-an-unknown-resistor-whi-jee-main-physics-units-and-measurements-nhbw2viowas8fkvx)
[190 JEE Main 2019 (Online) 10th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-actual-value-of-resistance-r-shown-in-the-figure-is-30-jee-main-physics-units-and-measurements-oot4jcsxprg7krcy)
[191 JEE Main 2019 (Online) 10th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-wheatstone-bridge-shown-in-figure-here-gets-balanced-w-jee-main-physics-units-and-measurements-w1bzgtrind1lcvkb)
[192 A uniform metallic wire has a resistance of 18 \$\$\\Omega \$\$ and is bent into an equilateral triangle. Then, the resistance between any two vertices of the triangle is - JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/a-uniform-metallic-wire-has-a-resistance-of-18-omega-a-jee-main-physics-units-and-measurements-ks6kk3srfzoahruv)
[193 A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be passed through this resistor is - JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/a-2-w-carbon-resistor-is-color-coded-with-green-black-red-jee-main-physics-units-and-measurements-ff4cx9zjcwuiramw)
[194 JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-the-cells-have-zero-internal-resistance-jee-main-physics-units-and-measurements-yc59bwt197fa4lqt)
[195 JEE Main 2019 (Online) 10th January Morning Slot](https://questions.examside.com/past-years/jee/question/a-potentiometer-wire-ab-having-length-l-and-resistance-12-r-jee-main-physics-units-and-measurements-tvywjwdwnktcbjen)
[196 JEE Main 2019 (Online) 9th January Evening Slot](https://questions.examside.com/past-years/jee/question/a-carbon-resistance-has-a-following-colour-code-what-is-the-jee-main-physics-units-and-measurements-uypbhp7zspdrsroi)
[197 JEE Main 2019 (Online) 9th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-the-the-internal-resistance-of-the-18-v-jee-main-physics-units-and-measurements-u2wtsk4lw4lwfxjb)
[198 JEE Main 2019 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-determine-the-value-of-i-jee-main-physics-units-and-measurements-izcykdjlk1wa36su)
[199 JEE Main 2019 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/four-colour-band-resistor-with-colours-of-band-is-given-in-f-jee-main-physics-units-and-measurements-ybvzsryfh5kap7ao)
[200 Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2, is \$\$\\upsilon \$\$. If the electron density in copper is 9 \$\$ \\times \$\$ 1028/m3 the value of \$\$\\upsilon \$\$. in mm/s is close to (Take charge of electron to be = 1.6 \$\$ \\times \$\$ 10\$\$-\$\$19C) JEE Main 2019 (Online) 9th January Morning Slot](https://questions.examside.com/past-years/jee/question/there-is-a-current-of-1344-amp-in-a-copper-wire-whose-area-jee-main-physics-units-and-measurements-kmfumhe9pfvi9tyx)
[201 A galvanometer with its coil resistance 25 \$\$\\Omega \$\$ requires a current of 1 mA for its full deflection. In order to construct an ammeter to read upto a current of 2 A, the approximate value of the shunt resistance should be : JEE Main 2018 (Online) 16th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-with-its-coil-resistance-25-omega-requi-jee-main-physics-units-and-measurements-2xgmthurbig0kqbl)
[202 A heating element has a resistance of 100 \$\$\\Omega \$\$ at room temperature. When it is connected to a supply of 220 V, a steady current of 2 A passes in it and temperature is 500oC more than room temperature. what is the temperature coefficient of resistance of the heating element ? JEE Main 2018 (Online) 16th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-heating-element-has-a-resistance-of-100-omega-at-roo-jee-main-physics-units-and-measurements-ywfaiacdhb7aaob0)
[203 In a circuit for finding the resistance of a galvanometer by half deflection method, a 6 V battery and a high resistance of 11 k\$\$\\Omega \$\$ are used. The figure of merit of the galvanometer is 60 \$\$\\mu A/\$\$division. In the absence of shunt resistance, the galvanometer produces a deflection of \$\$\\theta \$\$ = 9 divisions when current flows in the circuit. The value of the shunt resistance that can cause the deflection of \$\$\\theta /2,\$\$ is closest to : JEE Main 2018 (Online) 16th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-circuit-for-finding-the-resistance-of-a-galvanometer-b-jee-main-physics-units-and-measurements-vzipwgizqe5coo26)
[204 On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of their series combination is 1 k\$\$\\Omega \$\$. How much was the resistance on the left slot before interchanging the resistances? JEE Main 2018 (Offline)](https://questions.examside.com/past-years/jee/question/on-interchanging-the-resistances-the-balance-point-of-a-met-2018-marks-4-hcig5kv9z1xl432i.htm)
[205 Two batteries with e.m.f 12 V and 13 V are connected in parallel across a load resistor of 10 \$\$\\Omega \$\$. The internal resistances of the two batteries are 1 \$\$\\Omega \$\$ and 2 \$\$\\Omega \$\$ respectively. The voltage across the load lies between : JEE Main 2018 (Offline)](https://questions.examside.com/past-years/jee/question/two-batteries-with-emf-12-v-and-13-v-are-connected-in-para-2018-marks-4-5nhevsoisfvxpiku.htm)
[206 In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by a resistance of 5 \$\$\\Omega\$\$, a balance is found when the cell is connected across 40 cm of the wire. Find the internal resistance of the cell. JEE Main 2018 (Offline)](https://questions.examside.com/past-years/jee/question/in-a-potentiometer-experiment-it-is-found-that-no-current-p-2018-marks-4-r9udgikcd5ckm2yu.htm)
[207 A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge density of the rod is \$\$\\rho \$\$, how long will the changes take to travel a distance d ? JEE Main 2018 (Online) 15th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-copper-rod-of-cross-sectional-area-a-carries-a-uniform-cur-jee-main-physics-units-and-measurements-qrkvzrbrepub7u07)
[208 A constant voltages is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be : JEE Main 2018 (Online) 15th April Evening Slot](https://questions.examside.com/past-years/jee/question/a-constant-voltages-is-applied-between-two-ends-of-a-metalli-jee-main-physics-units-and-measurements-emdycc8k0mysz6ea)
[209  In a meter bridge, as shown in the figure, it is given that resistance \$\$Y = 12.5\\,\\,\\Omega \$\$ and that the balance is obtained at a distance \$\$39.5\$\$ \$\$cm\$\$ from end \$\$A\$\$ (by Jockey J). After interchanging the resistances \$\$X\$\$ and \$\$Y\$\$, a new balance point is found at a distance \$\${l\_2}\$\$ from end \$\$A.\$\$ What are the value of \$\$X\$\$ and \$\${l\_2}\$\$ ? JEE Main 2018 (Online) 15th April Morning Slot](https://questions.examside.com/past-years/jee/question/-in-a-meter-bridge-as-shown-in-the-figure-it-is-given-tha-jee-main-physics-units-and-measurements-5mpkvahgzog2n8lt)
[210 JEE Main 2018 (Online) 15th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-all-resistances-are-of-value-r-oh-jee-main-physics-units-and-measurements-m7leau3hpapfqbqq)
[211 JEE Main 2017 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/the-figure-shows-three-circuits-i-ii-and-iii-which-are-conn-jee-main-physics-units-and-measurements-blrokt9eeaiu5etn)
[212 JEE Main 2017 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-resistances-are-connected-as-sh-jee-main-physics-units-and-measurements-vkjwe7i7ozn49zi5)
[213 A uniform wire of length 1 and radius r has a resistance of 100 \$\$\\Omega \$\$. It is recast into a wire of radius \$\${r \\over 2}.\$\$ The resistance of new wire will be : JEE Main 2017 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-uniformwire-of-length-1-and-radius-r-has-a-resistae-of-100-jee-main-physics-units-and-measurements-be1x2mry1ld8xwnh)
[214  A 9 V battery with internal resistance of 0.5 \$\$\\Omega \$\$ is connected across an infinite network as shown in the figure. All ammeters A1, A2, 3 and voltmeter V are ideal. Choose correct statement. JEE Main 2017 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/-a-9-v-battery-with-internal-resistance-of-05-omega-jee-main-physics-units-and-measurements-hgpsuyeqixxdqn5y)
[215 JEE Main 2017 (Online) 8th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-potentiometer-pq-is-set-up-to-compare-two-resistances-as-s-jee-main-physics-units-and-measurements-x2fxwcwrbr9q2ulw)
[216 Which of the following statements is **false**? JEE Main 2017 (Offline)](https://questions.examside.com/past-years/jee/question/which-of-the-following-statements-is-false-2017-marks-4-acmtzs0l84nu9o5z.htm)
[217  In the given circuit, the current in each resistance is: JEE Main 2017 (Offline)](https://questions.examside.com/past-years/jee/question/-in-the-given-circuit-the-current-in-each-resistance-is-2017-marks-4-q6enrjemho3wyldd.htm)
[218 When a current of 5 mA is passed through a galvanometer having a coil of resistance 15\$\$\\Omega \$\$, it shows full scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range 0 – 10V is: JEE Main 2017 (Offline)](https://questions.examside.com/past-years/jee/question/when-a-current-of-5-ma-is-passed-through-a-galvanometer-havi-2017-marks-4-5at5yjbihnidc8j8.htm)
[219 JEE Main 2016 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-galvanometer-has-a-50-division-scale-battery-has-no-inter-jee-main-physics-units-and-measurements-jrk59ujxsdklusro)
[220 The resistance of an electrical toaster has a temperature dependence given by R(T) = R0 \[1 + \$\$\\alpha \$\$(T − T0)\] in its range of operation. At T0 = 300 K, R = 100 \$\$\\Omega \$\$ and at T = 500 K, R = 120 \$\$\\Omega \$\$. The toaster is connected to a voltage source at 200 V and its temperature is raised at a constant rate from 300 to 500 K in 30 s. The total work done in raising the temperature is : JEE Main 2016 (Online) 10th April Morning Slot](https://questions.examside.com/past-years/jee/question/the-resistance-of-an-electrical-toaster-has-a-temperature-de-jee-main-physics-units-and-measurements-gdlbri2iyi4nxtc8)
[221  In the circuit shown, the resistance r is a variable resistance. If for r = *fR,* the heat generation in r is maximum then the value of *f* is : JEE Main 2016 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/-in-the-circuit-shown-the-resistance-r-is-a-variable-resist-jee-main-physics-units-and-measurements-hquvp1wne8xzk1dq)
[222 A 50 \$\$\\Omega \$\$ resistance is connected to a battery of 5 V. A galvanometer of resistance 100 \$\$\\Omega \$\$ is to be used as an ammeter to measure current through the resistance, for this a resistance rs is connected to the galvanometer. Which of the following connections should be employed if the measured current is within 1% of thecurrent without the ammeter in the circuit ? JEE Main 2016 (Online) 9th April Morning Slot](https://questions.examside.com/past-years/jee/question/a-50-omega-resistance-is-connected-to-a-battery-of-5-v-jee-main-physics-units-and-measurements-e109uidj20gy3ns3)
[223 A galvanometer having a coil resistance of \$\$100\\,\\Omega \$\$ gives a full scale deflection, when a currect of \$\$1\$\$ \$\$mA\$\$ is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of \$\$10\$\$ \$\$A,\$\$ is : JEE Main 2016 (Offline)](https://questions.examside.com/past-years/jee/question/a-galvanometer-having-a-coil-resistance-of-100omega-2016-marks-4-ojakst2xymzyer9p.htm)
[224  In the circuit shown, the current in the \$\$1\\Omega \$\$ resistor is : JEE Main 2015 (Offline)](https://questions.examside.com/past-years/jee/question/in-the-circuit-shown-the-current-in-the-1omega-resist-2015-marks-4-fyvsrq9yd8yfaqjo.htm)
[225 When \$\$5V\$\$ potential difference is applied across a wire of length \$\$0.1\$\$ \$\$m,\$\$ the drift speed of electrons is \$\$2.5 \\times {10^{ - 4}}\\,\\,m{s^{ - 1}}.\$\$ If the electron density in the wire is \$\$8 \\times {10^{28}}\\,\\,{m^{ - 3}},\$\$ the resistivity of the material is close to : JEE Main 2015 (Offline)](https://questions.examside.com/past-years/jee/question/when-5v-potential-difference-is-applied-across-a-wire-of-2015-marks-4-gwzftrio0loijl7b.htm)
[226 In a large building, three are \$\$15\$\$ bulbs of \$\$40\$\$ \$\$W\$\$, \$\$5\$\$ bulbs of \$\$100\$\$ \$\$W\$\$, \$\$5\$\$ fans of \$\$80\$\$ \$\$W\$\$ and \$\$1\$\$ heater of \$\$1\$\$ \$\$kW.\$\$ The voltage of electric mains is \$\$220\$\$ \$\$V.\$\$ The minimum capacity of the main fuse of the building will be: JEE Main 2014 (Offline)](https://questions.examside.com/past-years/jee/question/in-a-large-building-three-are-15-bulbs-of-40-w-2014-marks-4-lklwnuispso9zkmh.htm)
[227 The supply voltage to room is \$\$120V.\$\$ The resistance of the lead wires is \$\$6\\Omega \$\$. A \$\$60\$\$ \$\$W\$\$ bulb is already switched on. What is the decrease of voltage across the bulb, when a \$\$240\$\$ \$\$W\$\$ heater is switched on in parallel to the bulb? JEE Main 2013 (Offline)](https://questions.examside.com/past-years/jee/question/the-supply-voltage-to-room-is-120v-the-resistance-of-th-2013-marks-4-zz73qo0xacyd5g1n.htm)
[228 JEE Main 2013 (Offline)](https://questions.examside.com/past-years/jee/question/this-questions-has-statement-rm-i-and-statement-2013-marks-4-emacvdckcjfexpvy.htm)
[229 Two electric bulbs marked \$\$25W\$\$ \$\$-\$\$ \$\$220\$\$ \$\$V\$\$ and \$\$100W\$\$ \$\$-\$\$ \$\$220V\$\$ are connected in series to a \$\$440\$\$ \$\$V\$\$ supply. Which of the bulbs will fuse? AIEEE 2012](https://questions.examside.com/past-years/jee/question/two-electric-bulbs-marked-25w-220-v-and-2012-marks-4-q1gsthhcgtcd6pu7.htm)
[230 If a wire is stretched to make it \$\$0.1\\% \$\$ longer, its resistance will: AIEEE 2011](https://questions.examside.com/past-years/jee/question/if-a-wire-is-stretched-to-make-it-01-longer-its-res-2011-marks-4-a2nhsle1cqc2bd2t.htm)
[231 Two conductors have the same resistance at \$\${0^ \\circ }C\$\$ but their temperature coefficients of resistance are \$\${\\alpha \_1}\$\$ and \$\${\\alpha \_2}.\$\$ The respective temperature coefficients of their series and parallel combinations are nearly AIEEE 2010](https://questions.examside.com/past-years/jee/question/two-conductors-have-the-same-resistance-at-0-circ-c-2010-marks-4-d64yiqxouc6xmxcw.htm)
[232 AIEEE 2008](https://questions.examside.com/past-years/jee/question/shown-in-the-figure-below-is-a-meter-bridge-set-up-with-null-2008-marks-4-ztgsr6loh3y9b6b4.htm)
[233 AIEEE 2008](https://questions.examside.com/past-years/jee/question/consider-a-block-of-conducting-material-of-resistivity-r-2008-marks-4-qkfzxkk4ntqmjuop.htm)
[234 AIEEE 2008](https://questions.examside.com/past-years/jee/question/consider-a-block-of-conducting-material-of-resistivity-r-2008-marks-4-lzrfiw1ifbldnudx.htm)
[235 AIEEE 2008](https://questions.examside.com/past-years/jee/question/a-5v-battery-with-internal-resistance-2omega-and-a-2008-marks-4-wtmnsn9u9rwtubzg.htm)
[236 The resistance of a wire is \$\$5\$\$ ohm at \$\${50^ \\circ }C\$\$ and \$\$6\$\$ ohm at \$\${100^ \\circ }C.\$\$ The resistance of the wire at \$\${0^ \\circ }C\$\$ will be AIEEE 2007](https://questions.examside.com/past-years/jee/question/the-resistance-of-a-wire-is-5-ohm-at-50-circ-c-a-2007-marks-4-vbqtk6o2o9uz2mna.htm)
[237 A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will AIEEE 2006](https://questions.examside.com/past-years/jee/question/a-thermocouple-is-made-from-two-metals-antimony-and-bismuth-2006-marks-4-goyckb1pbfgv1tyk.htm)
[238 An electric bulb is rated \$\$220\$\$ volt - \$\$100\$\$ watt. The power consumed by it when operated on \$\$110\$\$ volt will be AIEEE 2006](https://questions.examside.com/past-years/jee/question/an-electric-bulb-is-rated-220-volt-100-watt-the-p-2006-marks-4-leik1aar1ed4jksx.htm)
[239 In a Wheatstone's bridge, three resistance \$\$P, Q\$\$ and \$\$R\$\$ connected in the three arms and the fourth arm is formed by two resistances \$\${S\_1}\$\$ and \$\${S\_2}\$\$ connected in parallel. The condition for the bridge to be balanced will be AIEEE 2006](https://questions.examside.com/past-years/jee/question/in-a-wheatstones-bridge-three-resistance-p-q-and-r-2006-marks-4-97iugmaetuoty92u.htm)
[240 The resistance of bulb filmanet is \$\$100\\Omega \$\$ at a temperature of \$\${100^ \\circ }C.\$\$ If its temperature coefficient of resistance be \$\$0.005\$\$ per \$\$^ \\circ C\$\$, its resistance will become \$\$200\\,\\Omega \$\$ at a temperature of AIEEE 2006](https://questions.examside.com/past-years/jee/question/the-resistance-of-bulb-filmanet-is-100omega-at-a-tempe-2006-marks-4-edjbnrfk51eripfm.htm)
[241 The current \$\${\\rm I}\$\$ drawn from the \$\$5\$\$ volt source will be  AIEEE 2006](https://questions.examside.com/past-years/jee/question/the-current-rm-i-drawn-from-the-5-volt-source-wil-2006-marks-4-z3fhlkp1hy20sqg8.htm)
[242 Two sources of equal \$\$emf\$\$ are connected to an external resistance \$\$R.\$\$ The internal resistance of the two sources are \$\${R\_1}\$\$ and \$\${R\_2}\\left( {{R\_1} \> {R\_1}} \\right).\$\$ If the potential difference across the source having internal resistance \$\${R\_2}\$\$ is zero, then AIEEE 2005](https://questions.examside.com/past-years/jee/question/two-sources-of-equal-emf-are-connected-to-an-external-re-2005-marks-4-kzl0wvkqcmamh0ey.htm)
[243 An energy source will supply a constant current into the load if its internal resistance is AIEEE 2005](https://questions.examside.com/past-years/jee/question/an-energy-source-will-supply-a-constant-current-into-the-loa-2005-marks-4-v2uyxyjy4iwpwxsq.htm)
[244 In a potentiometer experiment the balancing with a cell is at length \$\$240\$\$ \$\$cm.\$\$ On shunting the cell with a resistance of \$\$2\\Omega ,\$\$ the balancing length becomes \$\$120\$\$ \$\$cm\$\$. The internal resistance of the cell is AIEEE 2005](https://questions.examside.com/past-years/jee/question/in-a-potentiometer-experiment-the-balancing-with-a-cell-is-a-2005-marks-4-v6wcr5zbuwy1dmje.htm)
[245 The resistance of hot tungsten filament is about \$\$10\$\$ times the cold resistance. What will be resistance of \$\$100\$\$ \$\$W\$\$ and \$\$200\$\$ \$\$V\$\$ lamp when not in use ? AIEEE 2005](https://questions.examside.com/past-years/jee/question/the-resistance-of-hot-tungsten-filament-is-about-10-time-2005-marks-4-zihpahp6kbyelwtc.htm)
[246 A moving coil galvanometer has \$\$150\$\$ equal divisions. Its current sensitivity is \$\$10\$\$- divisions per milliampere and voltage sensitivity is \$\$2\$\$ divisions per millivolt. In order that each division reads \$\$1\$\$ volt, the resistance in \$\$ohms\$\$ needed to be connected in series with the coil will be - AIEEE 2005](https://questions.examside.com/past-years/jee/question/a-moving-coil-galvanometer-has-150-equal-divisions-its-2005-marks-4-cpzym95vlwxghtmx.htm)
[247 Two voltmeters, one of copper and another of silver, are joined in parallel. When a total charge \$\$q\$\$ flows through the voltmeters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are \$\${Z\_1}\$\$ and \$\${Z\_2}\$\$ respectively the charge which flows through the silver voltmeter is AIEEE 2005](https://questions.examside.com/past-years/jee/question/two-voltmeters-one-of-copper-and-another-of-silver-are-joi-2005-marks-4-6soja5xiwlmklyvq.htm)
[248 In the circuit, the galvanometer \$\$G\$\$ shows zero deflection. If the batteries \$\$A\$\$ and \$\$B\$\$ have negligible internal resistance, the value of the resistor \$\$R\$\$ will be -  AIEEE 2005](https://questions.examside.com/past-years/jee/question/in-the-circuit-the-galvanometer-g-shows-zero-deflection-2005-marks-4-vhzhazm0gnuamlrg.htm)
[249 A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be AIEEE 2005](https://questions.examside.com/past-years/jee/question/a-heater-coil-is-cut-into-two-equal-parts-and-only-one-part-2005-marks-4-ts1rmmmalhvw3bqi.htm)
[250 The resistance of the series combination of two resistances is \$\$S.\$\$ When they are jointed in parallel the total resistance is \$\$P.\$\$ If \$\$S = nP\$\$ then the Minimum possible value of \$\$n\$\$ is AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-resistance-of-the-series-combination-of-two-resistances-2004-marks-4-wr8hjdc3se066k06.htm)
[251 An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii are in the ratio of \$\${4 \\over 3}\$\$ and \$\${2 \\over 3}\$\$, then the ratio of the current passing through the wires will be AIEEE 2004](https://questions.examside.com/past-years/jee/question/an-electric-current-is-passed-through-a-circuit-containing-t-2004-marks-4-bjq6wond4uoiakoa.htm)
[252 The total current supplied to the circuit by the battery is  AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-total-current-supplied-to-the-circuit-by-the-battery-is-2004-marks-4-wqpxflq3svqh5pjv.htm)
[253 In a meter bridge experiment null point is obtained at \$\$20\$\$ \$\$cm\$\$, from one end of the wire when resistance \$\$X\$\$ is balanced against another resistance \$\$Y.\$\$ If \$\$X \< Y\$\$, then where will be the new position of the null point from the same end, if one decides to balance a resistance of \$\$4\$\$ \$\$X\$\$ against \$\$Y\$\$ AIEEE 2004](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-null-point-is-obtained-at-20-2004-marks-4-emccdeyaxjpf8mlv.htm)
[254 Thermistors are usually made of AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-termistors-are-usually-made-of-2004-marks-4-wb8x5uhfdglimhec.htm)
[255 The electrochemical equivalent of a metal is \$\${3.35109^{ - 7}}\$\$ \$\$kg\$\$ per Coulomb. The mass of the metal liberated at the cathode when a \$\$3A\$\$ current is passed for \$\$2\$\$ seconds will be AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-electrochemical-equivalent-of-a-metal-is-335109-2004-marks-4-n45thvolm0ipejtq.htm)
[256 The thermo \$\$emf\$\$ of a thermocouple varies with temperature \$\$\\theta \$\$ of the hot junction as \$\$E = a\\theta + b{\\theta ^2}\$\$ in volts where the ratio \$\$a/b\$\$ is \$\${700^ \\circ }C.\$\$ If the cold junction is kept at \$\${0^ \\circ }C,\$\$ then the neutral temperature is AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-thermo-emf-of-a-thermocouple-varies-with-temperature-2004-marks-4-plnk8ufkilceltwx.htm)
[257 A material \$\$'B'\$\$ has twice the specific resistance of \$\$'A'.\$\$ A circular wire made of \$\$'B'\$\$ has twice the diameter of a wire made of \$\$'A'\$\$. Then for the two wires to have the same resistance, the ratio \$\${l \\over B}/{l \\over A}\$\$ of their respective lengths must be AIEEE 2004](https://questions.examside.com/past-years/jee/question/a-material-b-has-twice-the-specific-resistance-of-a-2004-marks-4-w0yp4gh8gzh7pfgv.htm)
[258 The Kirchhoff's first law \$\$\\left( {\\sum i = 0} \\right)\$\$ and second law \$\$\\left( {\\sum iR = \\sum E} \\right),\$\$ where the symbols have their usual meanings, are respectively based on AIEEE 2004](https://questions.examside.com/past-years/jee/question/the-kirchhoffs-first-law-left-sum-i-0-right-an-2004-marks-4-gespm7i5jjpctjzq.htm)
[259 The length of a given cylindrical wire is increased by \$\$100\\% \$\$. Due to the consequent decrease in diameter the change in the resistance of the wire will be AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-length-of-a-given-cylindrical-wire-is-increased-by-100-2003-marks-4-txwenjjwxkpjkag4.htm)
[260 A \$\$220\$\$ volt, \$\$1000\$\$ watt bulb is connected across a \$\$110\$\$ \$\$volt\$\$ mains supply. The power consumed will be AIEEE 2003](https://questions.examside.com/past-years/jee/question/a-220-volt-1000-watt-bulb-is-connected-across-a-1-2003-marks-4-cy7fsxiy2upkikqw.htm)
[261 A \$\$3\$\$ volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current \$\${\\rm I}\$\$, in the circuit will be  AIEEE 2003](https://questions.examside.com/past-years/jee/question/a-3-volt-battery-with-negligible-internal-resistance-is-2003-marks-4-bk5sv78j3l0z0crc.htm)
[262 The nagative \$\$Zn\$\$ pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by \$\$0.13g\$\$ in \$\$30\$\$ minutes. If the electrochemical equivalent of \$\$Zn\$\$ and \$\$Cu\$\$ are \$\$32.5\$\$ and \$\$31.5\$\$ respectively, the increase in the mass of the positive \$\$Cu\$\$ pole in this time is AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-nagative-zn-pole-of-a-daniell-cell-sending-a-consta-2003-marks-4-oc1wl3icwlwoyzf3.htm)
[263 The thermo \$\$e.m.f.\$\$ of a thermo -couple is \$\$25\$\$ \$\$\\mu V/{}^ \\circ C\$\$ at room temperature. A galvanometer of \$\$40\$\$ \$\$ohm\$\$ resistance, capable of detecting current as low as \$\${10^{ - 5}}\\,A,\$\$ is connected with the thermo couple. The smallest temperature difference that can be detected by this system is AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-thermo-emf-of-a-thermo-couple-is-25-mu-v-2003-marks-4-ocfpjgdx87zk9nbi.htm)
[264 AIEEE 2003](https://questions.examside.com/past-years/jee/question/the-length-of-a-wire-of-a-potentiometer-is-100-cm-a-2003-marks-4-mre8l33bfkyzgwbw.htm)
[265 An ammeter reads upto \$\$1\$\$ ampere. Its internal resistance is \$\$0.81\$\$ \$\$ohm\$\$. To increase the range to \$\$10\$\$ \$\$A\$\$ the value of the required shunt is AIEEE 2003](https://questions.examside.com/past-years/jee/question/an-ammeter-reads-upto-1-ampere-its-internal-resistance-2003-marks-4-uq9zqy6wgfx7ctg0.htm)
[266 If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a AIEEE 2002](https://questions.examside.com/past-years/jee/question/if-an-ammeter-is-to-be-used-in-place-of-a-voltmeter-then-we-2002-marks-4-uilfmxxbpdgge81u.htm)
[267 A wire when connected to \$\$220\$\$ \$\$V\$\$ mains supply has power dissipation \$\${P\_1}.\$\$ Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is \$\${P\_2}.\$\$ Then \$\${P\_2}:{P\_1}\$\$ is AIEEE 2002](https://questions.examside.com/past-years/jee/question/a-wire-when-connected-to-220-v-mains-supply-has-powe-2002-marks-4-5m7eroc16wzrtcrz.htm)
[268 If \$\${\\theta \_1},\$\$ is the inversion temperature, \$\${\\theta \_n}\$\$ is the neutral temperature, \$\${\\theta \_c}\$\$ is the temperature of the cold junction, then AIEEE 2002](https://questions.examside.com/past-years/jee/question/if-theta-1-is-the-inversion-temperature-theta-2002-marks-4-b6jootyk7cfkebol.htm)
[269 The mass of product liberated on anode in an electrochemical cell depends on (where \$\$t\$\$ is the time period for which the current is passed). AIEEE 2002](https://questions.examside.com/past-years/jee/question/the-mass-of-product-liberated-on-anode-in-an-electrochemical-2002-marks-4-ggjquvwuc1dldp3s.htm)
[270 If in the circuit, power dissipation is \$\$150W,\$\$ then \$\$R\$\$ is  AIEEE 2002](https://questions.examside.com/past-years/jee/question/if-in-the-circuit-power-dissipation-is-150w-then-r-2002-marks-4-ae3baf5clpjfkbta.htm)
## Numerical
[1 JEE Main 2026 (Online) 28th January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-equivalent-resistance-between-the-points-a-and-b-jee-main-physics-units-and-measurements-ajmrixszs7mmpzyt)
[2 JEE Main 2026 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-a-meter-bridge-experiment-to-determine-the-value-of-un-jee-main-physics-units-and-measurements-dfeyixhn9kzanyba)
[3 JEE Main 2026 (Online) 22nd January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-cylindrical-conductor-of-length-2-m-and-area-of-cross-s-jee-main-physics-units-and-measurements-l2ovl2wobrnuxkop)
[4 JEE Main 2026 (Online) 21st January Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-heat-generated-in-1-minute-between-points-a-and-b-jee-main-physics-units-and-measurements-ja6vugy9m1tf3kny)
[5 Two cells of emfs 1 V and 2 V and internal resistances \$2 \\Omega\$ and \$1 \\Omega\$, respectively, are connected in series with an external resistance of \$6 \\Omega\$. The total current in the circuit is \$I\_1\$. Now the same two cells in parallel configuration are connected to same external resistance. In this case, the total current drawn is \$\\mathrm{I}\_2\$. The value of \$\\left(\\frac{\\mathrm{I}\_1}{\\mathrm{I}\_2}\\right)\$ is \$\\frac{x}{3}\$. The value of \$x\$ is\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2025 (Online) 3rd April Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-of-emfs-1-v-and-2-v-and-internal-resistances-2-jee-main-physics-units-and-measurements-a8sdpdlk7idnormv)
[6 JEE Main 2025 (Online) 3rd April Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-figure-shown-below-a-resistance-of-1504-omega-is-jee-main-physics-units-and-measurements-r2ne8kxilbqxutz9)
[7 JEE Main 2025 (Online) 28th January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-value-of-current-i-in-the-electrical-circuit-as-given-jee-main-physics-v4zqqm5ecaf8crvr)
[8 A wire of resistance \$9 \\Omega\$ is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be \_\_\_\_\_\_\_\_\_ ohm. JEE Main 2025 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-9-omega-is-bent-to-form-an-equila-jee-main-physics-units-and-measurements-bofvjvmear2xl9uy)
[9 JEE Main 2025 (Online) 22nd January Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-net-current-flowing-in-the-given-circuit-is--jee-main-physics-units-and-measurements-xm1etv4w9rlb02iq)
[10 JEE Main 2024 (Online) 9th April Evening Shift](https://questions.examside.com/past-years/jee/question/pto-determine-the-resistance-r-of-a-wire-a-circuit-is-d-jee-main-physics-motion-troinfut4t3hwjbp)
[11 At room temperature \$\$(27^{\\circ} \\mathrm{C})\$\$, the resistance of a heating element is \$\$50 \\Omega\$\$. The temperature coefficient of the material is \$\$2.4 \\times 10^{-4}{ }^{\\circ} \\mathrm{C}^{-1}\$\$. The temperature of the element, when its resistance is \$\$62 \\Omega\$\$, is \_\_\_\_\_\_\_\_\_\_\$\${ }^{\\circ} \\mathrm{C}\$\$. JEE Main 2024 (Online) 9th April Evening Shift](https://questions.examside.com/past-years/jee/question/pat-room-temperature-27circ-mathrmc-the-resi-jee-main-physics-motion-hoz6qlbrnrnc9s5u)
[12 JEE Main 2024 (Online) 9th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-flowing-through-the-1-omega-resistor-is-jee-main-physics-motion-vx9zxhmgm3nlj1ri)
[13 JEE Main 2024 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-heater-is-designed-to-operate-with-a-power-of-1000-m-jee-main-physics-motion-lbu09abqqx5qvrp8)
[14 Resistance of a wire at \$\$0^{\\circ} \\mathrm{C}, 100^{\\circ} \\mathrm{C}\$\$ and \$\$t^{\\circ} \\mathrm{C}\$\$ is found to be \$\$10 \\Omega, 10.2 \\Omega\$\$ and \$\$10.95 \\Omega\$\$ respectively. The temperature \$\$t\$\$ in Kelvin scale is \_\_\_\_\_\_\_\_\_. JEE Main 2024 (Online) 8th April Morning Shift](https://questions.examside.com/past-years/jee/question/presistance-of-a-wire-at-0circ-mathrmc-100cir-jee-main-physics-motion-fygmuhve2dxgisak)
[15 JEE Main 2024 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-an-ammeter-a-consists-of-a-240-ome-jee-main-physics-motion-pxbqzpxnjigdzvea)
[16 A wire of resistance \$\$R\$\$ and radius \$\$r\$\$ is stretched till its radius became \$\$r / 2\$\$. If new resistance of the stretched wire is \$\$x ~R\$\$, then value of \$\$x\$\$ is \_\_\_\_\_\_\_\_. JEE Main 2024 (Online) 6th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-r-and-radius-r-is-stretched-jee-main-physics-motion-ohmymdvzpg0li180)
[17 A wire of resistance \$\$20 \\Omega\$\$ is divided into 10 equal parts, resulting pairs. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is \_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2024 (Online) 5th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-wire-of-resistance-20-omega-is-divided-into-10-equ-jee-main-physics-motion-agdaof2cxzcsivc9)
[18 JEE Main 2024 (Online) 5th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-experiment-to-determine-the-galvanometer-resistanc-jee-main-physics-motion-qpc9xizmhwiwhsmg)
[19 Two wires \$\$A\$\$ and \$\$B\$\$ are made up of the same material and have the same mass. Wire \$\$A\$\$ has radius of \$\$2.0 \\mathrm{~mm}\$\$ and wire \$\$B\$\$ has radius of \$\$4.0 \\mathrm{~mm}\$\$. The resistance of wire \$\$B\$\$ is \$\$2 \\Omega\$\$. The resistance of wire \$\$A\$\$ is \_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2024 (Online) 4th April Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-wires-a-and-b-are-made-up-of-the-same-materia-jee-main-physics-motion-fabimnlvjemcr0mo)
[20 JEE Main 2024 (Online) 4th April Morning Shift](https://questions.examside.com/past-years/jee/question/ptwelve-wires-each-having-resistance-2-omega-are-join-jee-main-physics-motion-ekecmnwxxkkjgktt)
[21 The current in a conductor is expressed as \$I=3 t^2+4 t^3\$, where \$I\$ is in Ampere and \$t\$ is in second. The amount of electric charge that flows through a section of the conductor during \$t=1 \\mathrm{~s}\$ to \$t=2 \\mathrm{~s}\$ is \_\_\_\_\_\_\_\_\_\_ C. JEE Main 2024 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/the-current-in-a-conductor-is-expressed-as-i3-t24-t3-jee-main-physics-zgz5krztrugza7xp)
[22 JEE Main 2024 (Online) 31st January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-following-circuit-the-battery-has-an-emf-of-2--jee-main-physics-motion-evfulmhlb80yoqxq)
[23 JEE Main 2024 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/pequivalent-resistance-of-the-following-network-is--jee-main-physics-motion-dmrnx1y9jvqjq3zq)
[24 Two resistance of \$\$100 \\Omega\$\$ and \$\$200 \\Omega\$\$ are connected in series with a battery of \$\$4 \\mathrm{~V}\$\$ and negligible internal resistance. A voltmeter is used to measure voltage across \$\$100 \\Omega\$\$ resistance, which gives reading as \$\$1 \\mathrm{~V}\$\$. The resistance of voltmeter must be \_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2024 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistance-of-100-omega-and-200-omega-are-c-jee-main-physics-motion-i36tcbmwvrqjmtv5)
[25 JEE Main 2024 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-are-connected-in-opposition-as-shown-cell-m-jee-main-physics-motion-d0h4h736grezfign)
[26 JEE Main 2024 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-current-flowing-through-the-res-jee-main-physics-motion-gbzcipm1lyajcoob)
[27 JEE Main 2023 (Online) 15th April Morning Shift](https://questions.examside.com/past-years/jee/question/a-network-of-four-resistances-is-connected-to-9-mathrmv-jee-main-physics-zexdhbit50txtkfq)
[28 When a resistance of \$\$5 ~\\Omega\$\$ is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of \$\$250 \\mathrm{~mA}\$\$, however when \$\$1050 ~\\Omega\$\$ resistance is connected with it in series, it gives full scale deflection for 25 volt. The resistance of galvanometer is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2023 (Online) 13th April Morning Shift](https://questions.examside.com/past-years/jee/question/pwhen-a-resistance-of-5-omega-is-shunted-with-a-movi-jee-main-physics-motion-jdglomh08pdlslso)
[29 A potential \$\$\\mathrm{V}\_{0}\$\$ is applied across a uniform wire of resistance \$\$R\$\$. The power dissipation is \$\$P\_{1}\$\$. The wire is then cut into two equal halves and a potential of \$\$V\_{0}\$\$ is applied across the length of each half. The total power dissipation across two wires is \$\$P\_{2}\$\$. The ratio \$\$P\_{2}: \\mathrm{P}\_{1}\$\$ is \$\$\\sqrt{x}: 1\$\$. The value of \$\$x\$\$ is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 13th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-potential-mathrmv0-is-applied-across-a-unifor-jee-main-physics-motion-zrwwvtzzkfru7dfd)
[30 The current flowing through a conductor connected across a source is \$\$2 \\mathrm{~A}\$\$ and 1.2 \$\$\\mathrm{A}\$\$ at \$\$0^{\\circ} \\mathrm{C}\$\$ and \$\$100^{\\circ} \\mathrm{C}\$\$ respectively. The current flowing through the conductor at \$\$50^{\\circ} \\mathrm{C}\$\$ will be \_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{2} \\mathrm{~mA}\$\$. JEE Main 2023 (Online) 12th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-flowing-through-a-conductor-connected-across-jee-main-physics-motion-nizfgattzvqtbtu7)
[31 Two identical cells each of emf \$\$1.5 \\mathrm{~V}\$\$ are connected in series across a \$\$10 ~\\Omega\$\$ resistance. An ideal voltmeter connected across \$\$10 ~\\Omega\$\$ resistance reads \$\$1.5 \\mathrm{~V}\$\$. The internal resistance of each cell is \_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2023 (Online) 11th April Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-cells-each-of-emf-15-mathrmv-are-c-jee-main-physics-motion-yoim1lce1bylilxu)
[32 JEE Main 2023 (Online) 11th April Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-circuit-diagram-shown-in-figure-given-below-the-c-jee-main-physics-motion-ntyzfxvkaosv519o)
[33 A rectangular parallelopiped is measured as \$\$1 \\mathrm{~cm} \\times 1 \\mathrm{~cm} \\times 100 \\mathrm{~cm}\$\$. If its specific resistance is \$\$3 \\times 10^{-7} ~\\Omega \\mathrm{m}\$\$, then the resistance between its two opposite rectangular faces will be \_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-7} ~\\Omega\$\$. JEE Main 2023 (Online) 10th April Evening Shift](https://questions.examside.com/past-years/jee/question/pa-rectangular-parallelopiped-is-measured-as-1-mathrm-jee-main-physics-motion-uec2a6hampm4vxbv)
[34 10 resistors each of resistance 10 \$\$\\Omega\$\$ can be connected in such as to get maximum and minimum equivalent resistance. The ratio of maximum and minimum equivalent resistance will be \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 10th April Morning Shift](https://questions.examside.com/past-years/jee/question/p10-resistors-each-of-resistance-10-omega-can-be-conn-jee-main-physics-motion-qnzuhpkabwxy3auf)
[35 The number density of free electrons in copper is nearly \$\$8 \\times 10^{28} \\mathrm{~m}^{-3}\$\$. A copper wire has its area of cross section \$\$=2 \\times 10^{-6} \\mathrm{~m}^{2}\$\$ and is carrying a current of \$\$3.2 \\mathrm{~A}\$\$. The drift speed of the electrons is \_\_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-6} \\mathrm{ms}^{-1}\$\$ JEE Main 2023 (Online) 8th April Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-number-density-of-free-electrons-in-copper-is-nearly-jee-main-physics-motion-iv8tb4vtpe4aorkm)
[36 A current of \$\$2 \\mathrm{~A}\$\$ flows through a wire of cross-sectional area \$\$25.0 \\mathrm{~mm}^{2}\$\$. The number of free electrons in a cubic meter are \$\$2.0 \\times 10^{28}\$\$. The drift velocity of the electrons is \_\_\_\_\_\_\_\_\_\_ \$\$\\times 10^{-6} \\mathrm{~ms}^{-1}\$\$ (given, charge on electron \$\$=1.6 \\times 10^{-19} \\mathrm{C}\$\$ ). JEE Main 2023 (Online) 8th April Morning Shift](https://questions.examside.com/past-years/jee/question/pa-current-of-2-mathrma-flows-through-a-wire-of-cr-jee-main-physics-motion-xtfoqnggnf0oamie)
[37 JEE Main 2023 (Online) 6th April Evening Shift](https://questions.examside.com/past-years/jee/question/pas-shown-in-the-figure-the-voltmeter-reads-2-mathrm-jee-main-physics-motion-ierq087j4xkwxphy)
[38 The length of a metallic wire is increased by \$\$20 \\%\$\$ and its area of cross section is reduced by \$\$4 \\%\$\$. The percentage change in resistance of the metallic wire is \_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 6th April Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-length-of-a-metallic-wire-is-increased-by-20--a-jee-main-physics-motion-4zvmabw6vdhpxhao)
[39 JEE Main 2023 (Online) 1st February Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-value-of-left-mathrmi-jee-main-physics-motion-kzbibhjsjcg7vjxn)
[40 In an experiment to find emf of a cell using potentiometer, the length of null point for a cell of emf \$\$1.5 \\mathrm{~V}\$\$ is found to be \$\$60 \\mathrm{~cm}\$\$. If this cell is replaced by another cell of emf E, the length-of null point increases by \$\$40 \\mathrm{~cm}\$\$. The value of \$\$E\$\$ is \$\$\\frac{x}{10} V\$\$. The value of \$\$x\$\$ is \_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 1st February Morning Shift](https://questions.examside.com/past-years/jee/question/pin-an-experiment-to-find-emf-of-a-cell-using-potentiomete-jee-main-physics-motion-frt985tvmplsclkz)
[41 Two identical cells, when connected either in parallel or in series gives same current in an external resistance \$\$5 ~\\Omega\$\$. The internal resistance of each cell will be \_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2023 (Online) 31st January Morning Shift](https://questions.examside.com/past-years/jee/question/ptwo-identical-cells-when-connected-either-in-parallel-or-jee-main-physics-motion-2tvyueqxxu0gw5hj)
[42 JEE Main 2023 (Online) 30th January Evening Shift](https://questions.examside.com/past-years/jee/question/pif-the-potential-difference-between-mathrmb-and-ma-jee-main-physics-5fwed8bfzu4pdjgf)
[43 JEE Main 2023 (Online) 30th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-following-circuit-the-magnitude-of-current-isub-jee-main-physics-motion-bv0vz330rwzzjtwy)
[44 A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by 5\$\$\\Omega\$\$. When a resistance of 15\$\$\\Omega\$\$ is used for shunting, null point moves to 300 cm. The internal resistance of the cell is \_\_\_\_\_\_\_\_\_\_\_\$\$\\Omega\$\$. JEE Main 2023 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pa-null-point-is-found-at-200-cm-in-potentiometer-when-cel-jee-main-physics-motion-0wswvdabxjruicll)
[45 When two resistance \$\$\\mathrm{R\_1}\$\$ and \$\$\\mathrm{R\_2}\$\$ connected in series and introduced into the left gap of a meter bridge and a resistance of 10 \$\$\\Omega\$\$ is introduced into the right gap, a null point is found at 60 cm from left side. When \$\$\\mathrm{R\_1}\$\$ and \$\$\\mathrm{R\_2}\$\$ are connected in parallel and introduced into the left gap, a resistance of 3 \$\$\\Omega\$\$ is introduced into the right gap to get null point at 40 cm from left end. The product of \$\$\\mathrm{R\_1}\$\$ \$\$\\mathrm{R\_2}\$\$ is \_\_\_\_\_\_\_\_\_\_\_\_\$\$\\Omega^2\$\$ JEE Main 2023 (Online) 29th January Evening Shift](https://questions.examside.com/past-years/jee/question/pwhen-two-resistance-mathrmr1-and-mathrmr2-jee-main-physics-motion-9cqlzyww0rpwmsz2)
[46 In a metre bridge experiment the balance point is obtained if the gaps are closed by 2\$\$\\Omega\$\$ and 3\$\$\\Omega\$\$. A shunt of X \$\$\\Omega\$\$ is added to 3\$\$\\Omega\$\$ resistor to shift the balancing point by 22.5 cm. The value of X is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 29th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-a-metre-bridge-experiment-the-balance-point-is-obtaine-jee-main-physics-motion-zokhswpejrfwuirs)
[47 JEE Main 2023 (Online) 25th January Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-cells-are-connected-between-points-a-and-b-as-shown-jee-main-physics-motion-0jrr9jn21duwh8lf)
[48 JEE Main 2023 (Online) 25th January Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-the-equivalent-resistance-between-t-jee-main-physics-motion-3wllgyv58fwamvmv)
[49 If a copper wire is stretched to increase its length by 20%. The percentage increase in resistance of the wire is \_\_\_\_\_\_\_\_\_\_%. JEE Main 2023 (Online) 24th January Evening Shift](https://questions.examside.com/past-years/jee/question/pif-a-copper-wire-is-stretched-to-increase-its-length-by-2-jee-main-physics-motion-xqfdcnvndhywrumr)
[50 A hollow cylindrical conductor has length of 3.14 m, while its inner and outer diameters are 4 mm and 8 mm respectively. The resistance of the conductor is \$\$n\\times10^{-3}\\Omega\$\$. If the resistivity of the material is \$\$\\mathrm{2.4\\times10^{-8}\\Omega m}\$\$. The value of \$\$n\$\$ is \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2023 (Online) 24th January Morning Shift](https://questions.examside.com/past-years/jee/question/pa-hollow-cylindrical-conductor-has-length-of-314-m-whil-jee-main-physics-motion-7eqcysop6wmqb125)
[51 JEE Main 2022 (Online) 29th July Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-i-flowing-through-the-given-circuit-will-be--jee-main-physics-motion-33cucqvg31ar9oiq)
[52 An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220 V, 60 W. If the voltage across combination is 220 V, the power consumed by the 100 W bulb will be about \_\_\_\_\_\_\_ W. JEE Main 2022 (Online) 28th July Evening Shift](https://questions.examside.com/past-years/jee/question/pan-electrical-bulb-rated-220-v-100-w-is-connected-in-se-jee-main-physics-motion-ozgw1wamvale0bc1)
[53 JEE Main 2022 (Online) 28th July Morning Shift](https://questions.examside.com/past-years/jee/question/pas-shown-in-the-figure-a-potentiometer-wire-of-resistanc-jee-main-physics-motion-vatkcqchuzbuk89q)
[54 JEE Main 2022 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-of-meter-bridge-experiment-the-balan-jee-main-physics-motion-geuptmnat7srrwzv)
[55 JEE Main 2022 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/pin-a-meter-bridge-experiment-for-measuring-unknown-resis-jee-main-physics-motion-kh65ttap3u3oqu0j)
[56 JEE Main 2022 (Online) 27th July Morning Shift](https://questions.examside.com/past-years/jee/question/pa-1-mathrmm-long-copper-wire-carries-a-current-of-jee-main-physics-motion-040um67awgj3jw1j)
[57 A potentiometer wire of length \$\$300 \\mathrm{~cm}\$\$ is connected in series with a resistance 780 \$\$\\Omega\$\$ and a standard cell of emf \$\$4 \\mathrm{V}\$\$. A constant current flows through potentiometer wire. The length of the null point for cell of emf \$\$20\\, \\mathrm{mV}\$\$ is found to be \$\$60 \\mathrm{~cm}\$\$. The resistance of the potentiometer wire is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2022 (Online) 26th July Evening Shift](https://questions.examside.com/past-years/jee/question/pa-potentiometer-wire-of-length-300-mathrmcm-is-co-jee-main-physics-motion-vrawlf2xx3veaupm)
[58 JEE Main 2022 (Online) 26th July Morning Shift](https://questions.examside.com/past-years/jee/question/presistances-are-connected-in-a-meter-bridge-circuit-as-sh-jee-main-physics-motion-ytlnssyx9dyg8ozl)
[59 In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now replaced by another cell of emf 1.80 V. The difference in balancing length of potentiometer wire in above conditions will be \_\_\_\_\_\_\_\_\_\_\_ cm. JEE Main 2022 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/pin-a-potentiometer-arrangement-a-cell-of-emf-120-v-give-jee-main-physics-motion-l46shmhgdqmacvxl)
[60 JEE Main 2022 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-figure-the-value-of-vsubosub-will-be--jee-main-physics-motion-bruldk53rn8ceqlv)
[61 Eight copper wire of length \$\$l\$\$ and diameter \$\$d\$\$ are joined in parallel to form a single composite conductor of resistance \$\$R\$\$. If a single copper wire of length \$\$2 l\$\$ have the same resistance \$\$(R)\$\$ then its diameter will be \_\_\_\_\_\_\_\_\_\_\_\_ d. JEE Main 2022 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/peight-copper-wire-of-length-l-and-diameter-d-are-jee-main-physics-motion-zslwm9c8vpgfgs0h)
[62 JEE Main 2022 (Online) 30th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-circuit-diagram-of-potentiometer-used-to-measure-the-jee-main-physics-motion-la7dnbyq2r1tbuzi)
[63 JEE Main 2022 (Online) 29th June Evening Shift](https://questions.examside.com/past-years/jee/question/ptwo-resistors-are-connected-in-series-across-a-battery-as-jee-main-physics-motion-towvfriaqicl8g26)
[64 JEE Main 2022 (Online) 29th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-variation-of-applied-potential-and-current-flowing-th-jee-main-physics-motion-k5wdfpjhsz1vg473)
[65 JEE Main 2022 (Online) 29th June Morning Shift](https://questions.examside.com/past-years/jee/question/pfor-the-network-shown-below-the-value-of-vsubbsub--jee-main-physics-motion-rhmq640dmrzqkedd)
[66 JEE Main 2022 (Online) 28th June Evening Shift](https://questions.examside.com/past-years/jee/question/pall-resistances-in-figure-are-1-omega-each-the-valu-jee-main-physics-motion-vpubs5ae2jbm6rs7)
[67 JEE Main 2022 (Online) 28th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-meter-bridge-setup-is-shown-in-the-figure-it-is-used-t-jee-main-physics-motion-84behrl1ks9owllz)
[68 JEE Main 2022 (Online) 28th June Morning Shift](https://questions.examside.com/past-years/jee/question/pcurrent-measured-by-the-ammeter-a-in-the-reported-circu-jee-main-physics-motion-xvcbrwswognsrraw)
[69 The current density in a cylindrical wire of radius r = 4.0 mm is 1.0 \$\$\\times\$\$ 106 A/m2. The current through the outer portion of the wire between radial distances \$\${r \\over 2}\$\$ and r is x\$\$\\pi\$\$ A; where x is \_\_\_\_\_\_\_\_\_\_. JEE Main 2022 (Online) 27th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-current-density-in-a-cylindrical-wire-of-radius-r--4-jee-main-physics-motion-iockwwuguvk1mwlx)
[70 JEE Main 2022 (Online) 27th June Evening Shift](https://questions.examside.com/past-years/jee/question/pin-the-given-circuit-a-is-an-arbitrary-constant-the-va-jee-main-physics-motion-y8ymtseid0fvv5b6)
[71 A cell, shunted by a 8 \$\$\\Omega\$\$ resistance, is balanced across a potentiometer wire of length 3 m. The balancing length is 2 m when the cell is shunted by 4 \$\$\\Omega\$\$ resistance. The value of internal resistance of the cell will be \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2022 (Online) 27th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-cell-shunted-by-a-8-omega-resistance-is-balanced-jee-main-physics-motion-8d697umrjg29gsee)
[72 The current density in a cylindrical wire of radius 4 mm is 4 \$\$\\times\$\$ 106 Am\$\$-\$\$2. The current through the outer portion of the wire between radial distances \$\${R \\over 2}\$\$ and R is \_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\pi\$\$ A. JEE Main 2022 (Online) 27th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-current-density-in-a-cylindrical-wire-of-radius-4-mm-jee-main-physics-motion-icyxmngndbfgvrnf)
[73 The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance of the wire will be \_\_\_\_\_\_\_\_\_\_\_\_ %. JEE Main 2022 (Online) 25th June Evening Shift](https://questions.examside.com/past-years/jee/question/pthe-length-of-a-given-cylindrical-wire-is-increased-to-do-jee-main-physics-motion-ic0kszpws0he8bej)
[74 A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10 s is \_\_\_\_\_\_\_\_\_\_\_\_ J. JEE Main 2022 (Online) 25th June Morning Shift](https://questions.examside.com/past-years/jee/question/pa-resistor-develops-300-j-of-thermal-energy-in-15-s-when-jee-main-physics-motion-4pdhu47zbgz3jjxn)
[75 JEE Main 2022 (Online) 25th June Morning Shift](https://questions.examside.com/past-years/jee/question/pthe-total-current-supplied-to-the-circuit-as-shown-in-fig-jee-main-physics-motion-tizo1nm2r7olfgog)
[76 A potentiometer wire of length 10 m and resistance 20 \$\$\\Omega\$\$ is connected in series with a 25 V battery and an external resistance 30 \$\$\\Omega\$\$. A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of E (in volt) is \$\${x \\over {10}}\$\$. The value of x is \_\_\_\_\_\_\_\_\_\_. JEE Main 2022 (Online) 24th June Evening Shift](https://questions.examside.com/past-years/jee/question/pa-potentiometer-wire-of-length-10-m-and-resistance-20--jee-main-physics-motion-b7g7dhrxzzfkkk5j)
[77 In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now replaced by another cell of unknown emf. If the ratio of the emf's of two cells respectively is 3 : 2, the difference in the balancing length of the potentiometer wire in above two cases will be \_\_\_\_\_\_\_\_\_\_\_ cm. JEE Main 2022 (Online) 24th June Morning Shift](https://questions.examside.com/past-years/jee/question/pin-a-potentiometer-arrangement-a-cell-gives-a-balancing-jee-main-physics-motion-vy87pdbfcck0ocsl)
[78 A uniform heating wire of resistance 36\$\$\\Omega\$\$ is connected across a potential difference of 240 V. The wire is then cut into half and potential difference of 240V is applied across each half separately. The ratio of power dissipation in first case to the total power dissipation in the second case would be 1 : x, where x is \_\_\_\_\_\_\_\_\_\_\_\_ JEE Main 2021 (Online) 1st September Evening Shift](https://questions.examside.com/past-years/jee/question/a-uniform-heating-wire-of-resistance-36omega-is-connect-jee-main-physics-units-and-measurements-bbfyuhzpw4qo9ye4)
[79 A resistor dissipates 192 J of energy in 1s when a current of 4A is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in 5s in \_\_\_\_\_\_\_\_\_ J. JEE Main 2021 (Online) 31st August Evening Shift](https://questions.examside.com/past-years/jee/question/a-resistor-dissipates-192-j-of-energy-in-1s-when-a-current-o-jee-main-physics-units-and-measurements-xwupyc0zvlquc9mn)
[80 A square shaped wire with resistance of each side 3\$\$\\Omega\$\$ is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in unit of \$\$\\Omega\$\$ will be \_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 31st August Morning Shift](https://questions.examside.com/past-years/jee/question/a-square-shaped-wire-with-resistance-of-each-side-3omega-jee-main-physics-units-and-measurements-bdsemobzdbqjf1ip)
[81 JEE Main 2021 (Online) 31st August Morning Shift](https://questions.examside.com/past-years/jee/question/the-voltage-drop-across-15omega-resistance-in-the-given-jee-main-physics-units-and-measurements-7qzqysecknkyqmib)
[82 JEE Main 2021 (Online) 27th August Evening Shift](https://questions.examside.com/past-years/jee/question/the-ratio-of-the-equivalent-resistance-of-the-network-shown-jee-main-physics-units-and-measurements-b5tttkpieaetbzpl)
[83 First, a set of n equal resistors of 10 \$\$\\Omega\$\$ each are connected in series to a battery of emf 20V and internal resistance 10\$\$\\Omega\$\$. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is ............... . JEE Main 2021 (Online) 27th August Morning Shift](https://questions.examside.com/past-years/jee/question/first-a-set-of-n-equal-resistors-of-10-omega-each-are-jee-main-physics-units-and-measurements-zuswitntwjsrkwmo)
[84 JEE Main 2021 (Online) 27th July Evening Shift](https://questions.examside.com/past-years/jee/question/for-the-circuit-shown-the-value-of-current-at-time-t--32-jee-main-physics-units-and-measurements-9niqaioflizdotsv)
[85 A 16 \$\$\\Omega\$\$ wire is bend to form a square loop. A 9V supply having internal resistance of 1\$\$\\Omega\$\$ is connected across one of its sides. The potential drop across the diagonals of the square loop is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\times\$\$ 10\$\$-\$\$1 V JEE Main 2021 (Online) 25th July Evening Shift](https://questions.examside.com/past-years/jee/question/a-16-omega-wire-is-bend-to-form-a-square-loop-a-9v-sup-jee-main-physics-units-and-measurements-0cvisunqa428abic)
[86 An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The resistance 'R' that must be put in series with the bulb so that the bulb delivers the same power is \_\_\_\_\_\_\_\_\_\_\_\_\_ \$\$\\Omega\$\$. JEE Main 2021 (Online) 25th July Morning Shift](https://questions.examside.com/past-years/jee/question/an-electric-bulb-rated-as-200-w-at-100-v-is-used-in-a-circui-jee-main-physics-units-and-measurements-qawyeh21shdqakxr)
[87 In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5\$\$\\Omega\$\$. However, it provides a potential difference of 1 V across a load resistance of 2\$\$\\Omega\$\$. The emf of the cell is given by \$\${x \\over {10}}V\$\$. Then the value of x is \_\_\_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 22th July Evening Shift](https://questions.examside.com/past-years/jee/question/in-an-electric-circuit-a-cell-of-certain-emf-provides-a-pot-jee-main-physics-units-and-measurements-ftq36txeyerqmxuy)
[88 JEE Main 2021 (Online) 20th July Evening Shift](https://questions.examside.com/past-years/jee/question/in-the-given-figure-switches-ssub1sub-and-ssub2sub-jee-main-physics-units-and-measurements-i447nbf9evr0eaki)
[89 Two wires of same length and thickness having specific resistances 6\$\$\\Omega\$\$ cm and 3\$\$\\Omega\$\$ cm respectively are connected in parallel. The effective resistivity is \$\$\\rho\$\$\$\$\\Omega\$\$ cm. The value of \$\$\\rho\$\$, to the nearest integer, is \_\_\_\_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 18th March Evening Shift](https://questions.examside.com/past-years/jee/question/two-wires-of-same-length-and-thickness-having-specific-resis-jee-main-physics-units-and-measurements-tt4vuhie8cq3hltt)
[90 JEE Main 2021 (Online) 18th March Evening Shift](https://questions.examside.com/past-years/jee/question/consider-a-72-cm-long-wire-ab-as-shown-in-the-figure-the-ga-jee-main-physics-units-and-measurements-nuvlqncqc3uoaqlp)
[91 JEE Main 2021 (Online) 18th March Morning Shift](https://questions.examside.com/past-years/jee/question/the-voltage-across-the-10omega-resistor-in-the-given-ci-jee-main-physics-units-and-measurements-fdh1yqszj0etge3j)
[92 The equivalent resistance of series combination of two resistors is 's'. When they are connected in parallel, the equivalent resistance is 'p'. If s = np, then the minimum value for n is \_\_\_\_\_\_\_\_\_\_\_\_. (Round off to the Nearest Integer) JEE Main 2021 (Online) 17th March Morning Shift](https://questions.examside.com/past-years/jee/question/the-equivalent-resistance-of-series-combination-of-two-resis-jee-main-physics-units-and-measurements-w0lan8vdf8dtraxy)
[93 The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is \_\_\_\_\_\_\_\_\_\_\_\$\$\\Omega\$\$. (Round off to the Nearest Integer) JEE Main 2021 (Online) 16th March Evening Shift](https://questions.examside.com/past-years/jee/question/the-energy-dissipated-by-a-resistor-is-10-mj-in-1-s-when-an-jee-main-physics-units-and-measurements-kt5ikfryjuetykfy)
[94 JEE Main 2021 (Online) 16th March Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-figure-given-the-electric-current-flowing-through-th-jee-main-physics-units-and-measurements-59jzdrpws0xie1av)
[95 In an electrical circuit, a battery is connected to pass 20C of charge through it in a certain given time. The potential difference between two plates of the battery is maintained at 15V. The workdone by the battery is \_\_\_\_\_\_\_\_\_\_J. JEE Main 2021 (Online) 26th February Morning Shift](https://questions.examside.com/past-years/jee/question/in-an-electrical-circuit-a-battery-is-connected-to-pass-20c-jee-main-physics-units-and-measurements-yntbkfl4gzclnqcm)
[96 JEE Main 2021 (Online) 25th February Evening Shift](https://questions.examside.com/past-years/jee/question/a-current-of-6a-enters-one-corner-p-of-an-equilateral-triang-jee-main-physics-units-and-measurements-lxixkny2wlgumgkd)
[97 JEE Main 2021 (Online) 25th February Morning Shift](https://questions.examside.com/past-years/jee/question/in-the-given-circuit-of-potentiometer-the-potential-differe-jee-main-physics-units-and-measurements-qfox2psp03t42ofm)
[98 A cylindrical wire of radius 0.5 mm and conductivity 5 \$\$\\times\$\$ 107 S/m is subjected to an electric field of 10 mV/m. The expected value of current in the wire will be x3\$\$\\pi\$\$ mA. The value of x is \_\_\_\_\_\_\_\_\_. JEE Main 2021 (Online) 24th February Evening Shift](https://questions.examside.com/past-years/jee/question/a-cylindrical-wire-of-radius-05-mm-and-conductivity-5-ti-jee-main-physics-units-and-measurements-zkarctbb2fn9c9xy)
[99 Four resistances 40 \$\$\\Omega \$\$, 60 \$\$\\Omega \$\$, 90 \$\$\\Omega \$\$ and 110 \$\$\\Omega \$\$ make the arms of a quadrilateral ABCD. Across AC is a battery of emf 40 V and internal resistance negligible.The potential difference across BD in V is \_\_\_\_\_\_\_.  JEE Main 2020 (Online) 4th September Evening Slot](https://questions.examside.com/past-years/jee/question/four-resistances-40-omega--60-omega--90-omega-jee-main-physics-current-electricity-72k6mk9kge6jupyd)
[100 In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is \$\$l\$\$ = 25 cm. If R is replaced by a wire of half length and half diameter that of R of same material, then the balancing distance \$\$l'\$\$ (in cm) will now be\_\_\_\_\_\_\_\_.  JEE Main 2020 (Online) 9th January Evening Slot](https://questions.examside.com/past-years/jee/question/in-a-meter-bridge-experiment-s-is-a-standard-resistance-r-i-jee-main-physics-electrostatics-ktfjlxnsbyier5f2)
[101 The series combination of two batteries, both of the same emf 10 V, but different internal resistance of 20\$\$\\Omega \$\$ and 5\$\$\\Omega \$\$, is connected to the parallel combination of two resistors 30\$\$\\Omega \$\$ and R \$\$\\Omega \$\$. The voltage difference across the battery of internal resistance 20\$\$\\Omega \$\$ is zero, the value of R (in \$\$\\Omega \$\$) is : \_\_\_\_\_\_\_ JEE Main 2020 (Online) 8th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-series-combination-of-two-batteries-both-of-the-same-em-jee-main-physics-current-electricity-rkwmhr066gw8154z)
[102 Four resistances of 15\$\$\\Omega \$\$, 12\$\$\\Omega \$\$, 4\$\$\\Omega \$\$ and 10\$\$\\Omega \$\$ respectively in cyclic order to form Wheatstone's network. The resistance that is to be connected in parallel with the resistance of 10\$\$\\Omega \$\$ to balance the network is \_\_\_\_\_\$\$\\Omega \$\$. JEE Main 2020 (Online) 8th January Morning Slot](https://questions.examside.com/past-years/jee/question/four-resistances-of-15omega--12omega--4omega-jee-main-physics-current-electricity-okzc29mwqxhaxr0t)
[103 The balancing length for a cell is 560 cm in a potentiometer experiment. When an external resistance of 10 \$\$\\Omega \$\$ is connected in parallel to the cell, the balancing length changes by 60 cm. If the internal resistance of the ceil is \$\${N \\over {10}}\$\$ \$\$\\Omega \$\$ , where N is an integer then value of N is ............. JEE Main 2020 (Online) 7th January Evening Slot](https://questions.examside.com/past-years/jee/question/the-balancing-length-for-a-cell-is-560-cm-in-a-potentiometer-jee-main-physics-electrostatics-ydmsmawwwkaxbd9s) |
| Shard | 187 (laksa) |
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| Unparsed URL | com,examside!questions,/past-years/jee/jee-main/physics/current-electricity s443 |