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Current Electricity — JEE Main & Advanced Physics PYQs

742 previous year questions from Current Electricity with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

742 questionsPhysicsSolutions on every page
1

A metal wire of cross-sectional area 0.5 mm ^2 and length 100 m is connected across a battery of e.m.f. 2 V and internal resistance 1 . The density, atomic mass and electrical cond

JEE Advanced 2026 Solution View → 2

As shown in the figure, the resistance of a galvanometer G can be found by the half-deflection method. Here the resistance R₂ is adjusted such that when the key K is closed the def

JEE Advanced 2026 Solution View → 3

The stored charge in the capacitor in steady state of the following circuit is ________ C.

JEE Main 2026 Solution View → 4

A moving coil of galvanometer when shunted with 2 , resistance gives a full scale deflection for a current of 500 mA. When a resistance of 470 , is connected in series it gives a f

JEE Main 2026 Solution View → 5

Two cells of emfs 1 V and 2 V and internal resistance 2 , and 1 , , respectively connected in parallel, gave a current of 1 A through an external resistance. If the polarity of one

JEE Main 2026 Solution View → 6

Refer to the circuit diagram given below. The heat generated across the 6 , resistance in 100 second is 100 J. The value of is _______. (Nearest integer)

JEE Main 2026 Solution View → 7

In an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as 10 V and 5 A , respectively. The least counts of voltm

JEE Main 2026 Solution View → 8

Under steady state condition the potential difference across the capacitor in the circuit is _______ V.

JEE Main 2026 Solution View → 9

When an external resistance of 5 is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5 resistor is replaced by a 2 resistor, a current of 0.5 A

JEE Main 2026 Solution View → 10

Refer to the figure given below. The values of I₁ , I₂ and I₃ are __________.

JEE Main 2026 Solution View → 11

Refer to the figure given below, current between terminals A and B is _____ A.

JEE Main 2026 Solution View → 12

A voltmeter with internal resistance of x can be used to measure upto 20 V. In order to increase its measuring range to 30 V, the required modification is to _____.

JEE Main 2026 Solution View → 13

The voltage and the current between A and B points shown in the circuit are _____.

JEE Main 2026 Solution View → 14

Two resistors of 200 , and 400 , are connected in series with a battery of 100 V. A bulb rated at 200 V, 100 W is connected across the 400 , resistance. The potential drop across t

JEE Main 2026 Solution View → 15

Which one of the following is not a measurable quantity?

JEE Main 2026 Solution View → 16

A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances (R₁=R₂=R₃=R₄ ) . When R₃ resistance is heated to some temperature, it

JEE Main 2026 Solution View → 17

For the two cells having same EMF E and internal resistance r , the current passing through the external resistor 6 is same when both the cells are connected either in parallel or

JEE Main 2026 Solution View → 18

In the potentiometer, when the cell in the secondary circuit is shunted with 4 resistance, the balance is obtained at the length 120 cm of wire. Now when the same cell is shunted w

JEE Main 2026 Solution View → 19

The equivalent resistance between the points A and B in the following circuit is x 5 . The value of x is _ _ _ _ .

JEE Main 2026 Solution View → 20

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 Solution View → 21

A moving coil galvanometer of resistance 100 shows a full scale deflection for a current of 1 mA. The value of resistance required to convert this galvanometer into an ammeter, sho

JEE Main 2026 Solution View → 22

A regular hexagon is formed by six wires each of resistance r and the corners are joined to the centre by wires of same resistance. If the current enters at one corner and leaves a

JEE Main 2026 Solution View → 23

In a meter bridge experiment to determine the value of unknown resistance, first the resistances 2 and 3 are connected in the left and right gaps of the bridge and the null point i

JEE Main 2026 Solution View → 24

Two resistors 2 and 3 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 resi

JEE Main 2026 Solution View → 25

Two resistors of 100 each are connected in series with a 9 V battery. A voltmeter of 400 resistance is connected to measure the voltage drop across one of the resistors. The voltme

JEE Main 2026 Solution View → 26

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 Solution View → 27

A wire of uniform resistance / 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(A O B) as shown in figure. The equi

JEE Main 2026 Solution View → 28

An electric power line having total resistance of 2 , delivers 1 kW of power at 250 V. The percentage efficiency of transmission line is _ _ _ _ .

JEE Main 2026 Solution View → 29

A cylindrical conductor of length 2 m and area of cross-section 0.2 ~mm ² carries an electric current of 1.6 A when its ends are connected to a 2 V battery. Mobility of electrons i

JEE Main 2026 Solution View → 30

A meter bridge with two resistances R₁ and R₂ 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 re

JEE Main 2026 Solution View → 31

Two known resistances of R and 2 R and one unknown resistance X are connected in a circuit as shown in the figure. If the equivalent resistance between points A and B in the circui

JEE Main 2026 Solution View → 32

The total length of potentiometer wire AB is 50 cm in the arrangement as shown in figure. If P is the point where the galvanometer shows zero reading then the length A P is _ _ _ _

JEE Main 2026 Solution View → 33

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 Solution View → 34

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 is connected across these points is _ _ _ _ J.

JEE Main 2026 Solution View → 35

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 Solution View → 36

From the combination of resistors with resistance values R₁=R₂=R₃=5 and R₄=10 , which of the following combination is the best circuit to get an equivalent resistance of 6 ?

JEE Main 2025 Solution View → 37

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 main supply. Th

JEE Main 2025 Solution View → 38

Current passing through a wire as function of time is given as I ( t )=0.02 t +0.01 ~A . The charge that will flow through the wire from t=1 s to t=2 s is :

JEE Main 2025 Solution View → 39

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 cal / s is

JEE Main 2025 Solution View → 40

Two cells of emf 1 V and 2 V and internal resistance 2 and 1 , respectively, are connected in series with an external resistance of 6 . The total current in the circuit is I ₁ . No

JEE Main 2025 Solution View → 41

A wire of length 25 m and cross-sectional area 5 ~mm ^2 having resistivity of 2 10⁻⁶ ~m is bent into a complete circle. The resistance between diametrically opposite points will be

JEE Main 2025 Solution View → 42

In the figure shown below, a resistance of 150.4 is connected in series to an ammeter A of resistance 240 . A shunt resistance of 10 is connected in parallel with the ammeter. The

JEE Main 2025 Solution View → 43

The battery of a mobile phone is rated as 4.2 V , 5800 mAh. How much energy is stored in it when fully charged ?

JEE Main 2025 Solution View → 44

The difference of temperature in a material can convert heat energy into electrical energy. To harvest the heat energy, the material should have

JEE Main 2025 Solution View → 45

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 Solution View → 46

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 triang

JEE Main 2025 Solution View → 47

Find the equivalent resistance between two ends of the following circuit

JEE Main 2025 Solution View → 48

A wire of resistance 9 is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be _____ ohm.

JEE Main 2025 Solution View → 49

A galvanometer having a coil of resistance 30 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

JEE Main 2025 Solution View → 50

What is the current through the battery in the circuit shown below

JEE Main 2025 Solution View → 51

The net current flowing in the given circuit is_______ A.

JEE Main 2025 Solution View → 52

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 equival

JEE Main 2025 Solution View → 53

Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance R_p=1 as shown in the figure. An external resistance of R_e=2 is connected via the s

JEE Main 2025 Solution View → 54

Which of the following resistivity ( ) v / s temperature (T) curves is most suitable to be used in wire bound standard resistors?

JEE Main 2025 Solution View → 55

The effective resistance between A and B , if resistance of each resistor is R , will be

JEE Main 2024 Solution View → 56

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

JEE Main 2024 Solution View → 57

A galvanmeter has a coil of resistance 200 with a full scale deflection at 20 A . The value of resistance to be added to use it as an ammeter of range (0-20) mA is ;

JEE Main 2024 Solution View → 58

The equivalent resistance between A and B is :

JEE Main 2024 Solution View → 59

The current flowing through the 1 resistor is n 10 A. The value of n is _________

JEE Main 2024 Solution View → 60

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

JEE Main 2024 Solution View → 61

A heater is designed to operate with a power of 1000 ~W in a 100 ~V line. It is connected in combination with a resistance of 10 and a resistance R , to a 100 ~V mains as shown in

JEE Main 2024 Solution View → 62

In the given circuit, the terminal potential difference of the cell is :

JEE Main 2024 Solution View → 63

Resistance of a wire at 0^ C , 100^ C and t^ C is found to be 10 , 10.2 and 10.95 respectively. The temperature t in Kelvin scale is _________

JEE Main 2024 Solution View → 64

The number of electrons flowing per second in the filament of a 110 ~W bulb operating at 220 ~V is : ( . Given . e =1.6 10⁻¹⁹ C )

JEE Main 2024 Solution View → 65

In the given figure an ammeter A consists of a 240 coil connected in parallel to a 10 shunt. The reading of the ammeter is mA

JEE Main 2024 Solution View → 66

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 Solution View → 67

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 Solution View → 68

A galvanometer of resistance 100 when connected in series with 400 measures a voltage of upto 10 ~V . The value of resistance required to convert the galvanometer into ammeter to r

JEE Main 2024 Solution View → 69

The ratio of heat dissipated per second through the resistance 5 and 10 in the circuit given below is :

JEE Main 2024 Solution View → 70

A wire of resistance 20 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

JEE Main 2024 Solution View → 71

In the given figure R ₁=10 , R ₂=8 , R ₃=4 and R ₄=8 . Battery is ideal with emf 12 ~V . Equivalent resistant of the circuit and current supplied by battery are respectively :

JEE Main 2024 Solution View → 72

In the experiment to determine the galvanometer resistance by half-deflection method, the plot of 1 / vs the resistance ( R ) of the resistance box is shown in the figure. The figu

JEE Main 2024 Solution View → 73

An electric bulb rated 50 ~W -200 ~V is connected across a 100 ~V supply. The power dissipation of the bulb is:

JEE Main 2024 Solution View → 74

Two wires A and B are made up of the same material and have the same mass. Wire A has radius of 2.0 ~mm and wire B has radius of 4.0 ~mm . The resistance of wire B is 2 . The resis

JEE Main 2024 Solution View → 75

To measure the internal resistance of a battery, potentiometer is used. For R =10 , the balance point is observed at l=500 ~cm and for R =1 the balance point is observed at l=400 ~

JEE Main 2024 Solution View → 76

Twelve wires each having resistance 2 are joined to form a cube. A battery of 6 ~V emf is joined across point a and c . The voltage difference between e and f is ______V.

JEE Main 2024 Solution View → 77

In a metre-bridge when a resistance in the left gap is 2 Ω and unknown resistance in the right gap, the balance length is found to be 40 cm . On shunting the unknown resistance wit

JEE Main 2024 Solution View → 78

In an ammeter, 5 % of the main current passes through the galvanometer. If resistance of the galvanometer is G , the resistance of ammeter will be:

JEE Main 2024 Solution View → 79

To measure the temperature coefficient of resistivity α of a semiconductor, an electrical arrangement shown in the figure is prepared. The arm BC is made up of the semiconductor. T

JEE Main 2024 Solution View → 80

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

JEE Main 2024 Solution View → 81

The reading in the ideal voltmeter V shown in the given circuit diagram is:

JEE Main 2024 Solution View → 82

A galvanometer has a resistance of 50 Ω and it allows maximum current of 5 mA . It can be converted into voltmeter to measure upto 100 V by connecting in series a resistor of resis

JEE Main 2024 Solution View → 83

By what percentage will the illumination of the lamp decrease if the current drops by 20 % ?

JEE Main 2024 Solution View → 84

In the following circuit, the battery has an emf of 2 V and an internal resistance of 2 3 Ω . The power consumption in the entire circuit is ______ W .

JEE Main 2024 Solution View → 85

The resistance per centimeter of a meter bridge wire is r , with X Ω resistance in left gap. Balancing length from left end is at 40 cm with 25 Ω resistance in right gap. Now the w

JEE Main 2024 Solution View → 86

Equivalent resistance of the following network is ________ Ω .

JEE Main 2024 Solution View → 87

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 mutual

JEE Main 2024 Solution View → 88

Two resistance of 100 Ω and 200 Ω are connected in series with a battery of 4 V and negligible internal resistance. A voltmeter is used to measure voltage across 100 Ω resistance,

JEE Main 2024 Solution View → 89

Two cells are connected in opposition as shown. Cell E 1 is of 8 V emf and 2 Ω internal resistance; the cell E 2 is of 2 V emf and 4 Ω internal resistance. The terminal potential d

JEE Main 2024 Solution View → 90

A potential divider circuit is shown in figure. The output voltage V 0 is

JEE Main 2024 Solution View → 91

An electric toaster has resistance of 60 Ω at room temperature 27 ° C . The toaster is connected to a 220 V supply. If the current flowing through it reaches 2 . 75 A , the tempera

JEE Main 2024 Solution View → 92

In the given circuit, the current in resistance R 3 is:

JEE Main 2024 Solution View → 93

In the given circuit, the current flowing through the resistance 20 Ω is 0 . 3 A , while the ammeter reads 0 . 9 A . The value of R 1 is _____ Ω .

JEE Main 2024 Solution View → 94

The electric current through a wire varies with time as I = I 0 + β t , where I 0 = 20 A and β = 3 A s - 1 . The amount of electric charge crossed through a section of the wire in

JEE Main 2024 Solution View → 95

A galvanometer having coil resistance 10 Ω shows a full scale deflection for a current of 3 mA . For it to measure a current of 8 A , the value of the shunt should be:

JEE Main 2024 Solution View → 96

The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of 24 Ω is applied. The resistance of galvanometer coil will be:

JEE Main 2024 Solution View → 97

Wheatstone bridge principle is used to measure the specific resistance S 1 of given wire, having length L , radius r . If X is the resistance of wire, then specific resistance is :

JEE Main 2024 Solution View → 98

A current of 200 μA deflects the coil of a moving coil galvanometer through 60 ° . The current to cause deflection through π 10 radian is

JEE Main 2024 Solution View → 99

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 a

JEE Main 2024 Solution View → 100

A wire of resistance R and length L is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be :

JEE Main 2024 Solution View → 101

A wire of length 10 cm and radius 7 × 10 - 4 m connected across the right gap of a meter bridge. When a resistance of 4 . 5 Ω is connected on the left gap by using a resistance box

JEE Main 2024 Solution View → 102

For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a galvanometer which has a coil of resistance 54 Ω showing a full scale deflection for 1 mA as in

JEE Main 2023 Solution View → 103

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

JEE Main 2023 Solution View → 104

In the given circuit, the current I through the battery will be

JEE Main 2023 Solution View → 105

A network of four resistances is connected to 9 V battery, as shown in figure. The magnitude of voltage difference between the points A and B is __________ V .

JEE Main 2023 Solution View → 106

Different combination of 3 resistors of equal resistance R are shown in the figures. The increasing order for power dissipation is: (A) (B) (C) (D)

JEE Main 2023 Solution View → 107

A potential 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 acros

JEE Main 2023 Solution View → 108

When a resistance of 5 Ω is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of 250 mA , however when 1050 Ω resistance is connecte

JEE Main 2023 Solution View → 109

A wire of resistance 160 Ω is melted and drawn in a wire of one-fourth of its length. The new resistance of the wire will be

JEE Main 2023 Solution View → 110

The current flowing through a conductor connected across a source is 2 A and 1 . 2 A at 0 o C and 100 o C respectively. The current flowing through the conductor at 50 o C will be

JEE Main 2023 Solution View → 111

The current flowing through R 2 is :

JEE Main 2023 Solution View → 112

Two identical cells each of emf 1 . 5 V are connected in series across a 10 Ω resistance. An ideal voltmeter connected across 10 Ω resistance reads 1 . 5 V . The internal

JEE Main 2023 Solution View → 113

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

JEE Main 2023 Solution View → 114

The current sensitivity of moving coil galvanometer is increased by 25 % . This increase is achieved only changing in the number of turns of coils and area of cross section of the

JEE Main 2023 Solution View → 115

In the circuit diagram shown in figure given below, the current flowing through resistance 3 Ω is x 3 A . The value of x is ________.

JEE Main 2023 Solution View → 116

In a metallic conductor, under the effect of applied electric field, the free electrons of the conductor

JEE Main 2023 Solution View → 117

A rectangular parallelopiped is measured as 1 cm × 1 cm × 100 cm . If its specific resistance is 3 × 10 - 7 Ω m , then the resistance between its two opposite r

JEE Main 2023 Solution View → 118

The equivalent resistance of the circuit shown below between points a and b is :

JEE Main 2023 Solution View → 119

10 resistors each of resistance 10 Ω can be connected in such as to get maximum and minimum equivalent resistance. The ratio of maximum and minimum equivalent resistance will

JEE Main 2023 Solution View → 120

The equivalent resistance between A and B as shown in figure is:

JEE Main 2023 Solution View →
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