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Current Electricity — NEET UG Physics PYQs

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

563 questionsPhysicsSolutions on every page
1

A potentiometer wire of 400 cm length has a resistance of 20 . It is connected in series with a resistance of 15 and a accumulator of EMF 6 V (negligible internal resistance). The

MHT CET Medical 2026 Solution View → 2

In the following figure current I equal to

MHT CET Medical 2026 Solution View → 3

The range of voltmeter is 10 V and its resistance is 50 . To convert it to a voltmeter of range 15 V , how much resistance is to be added?

MHT CET Medical 2026 Solution View → 4

When a galvanometer is shunted with a 2 resistance, the deflection is reduced to one-fourth. If the galvanometer is further shunted with a 1 resistance, the further reduction in de

MHT CET Medical 2026 Solution View → 5

A galvanometer can be converted into a voltmeter of certain range by connecting a resistance of 990 in series with it. When the resistance of 480 is connected in series, the range

MHT CET Medical 2026 Solution View → 6

A resistance is to be measured using a meter bridge; the student chooses the standard resistance R to be 100 . The student finds the null point at l₁=16 cm. To get the null point n

MHT CET Medical 2026 Solution View → 7

Which of the following statements is FALSE? A. In a balanced Wheatstone bridge, if the cell and the galvanometer are exchanged, the null point is disturbed. B. A rheostat can be us

MHT CET Medical 2026 Solution View → 8

A potentiometer wire has length 4 m and resistance 8 . The resistance that must be connected in series with the wire and the driving battery of e.m.f. 2 V, so as to get a potential

MHT CET Medical 2026 Solution View → 9

In a potentiometer experiment, the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 , the balancing length becomes 120 cm. The internal resist

MHT CET Medical 2026 Solution View → 10

In Wheatstone bridge, resistance P is formed by a parallel combination of p₁ and p₂ . The Q resistance is formed by a parallel combination of q₁ and q₂ . The remaining two resistan

MHT CET Medical 2026 Solution View → 11

A galvanometer of resistance ' G ', is shunted by a resistance ' S ' ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanomete

MHT CET Medical 2026 Solution View → 12

The equivalent resistance of the following circuit is nearly

MHT CET Medical 2026 Solution View → 13

When a galvanometer is shunted by a resistance S, its current capacity increases n times. If the same galvanometer is shunted by another resistance S', its current capacity will in

MHT CET Medical 2026 Solution View → 14

An ammeter of resistance R give a full scale deflection when a current of 3 A passes through it. If it is to measure maximum current of 10 A , the shunt required is

MHT CET Medical 2026 Solution View → 15

Let ' A ' be the cross-sectional area and ' ' be the specific resistance of a potentiometer wire. If ' I ' is the current passing through the wire, then the potential gradient alon

MHT CET Medical 2026 Solution View → 16

In a Wheatstone's network P R , the reading of the galvanometer is the same with a switch 'S' open or closed. Then

MHT CET Medical 2026 Solution View → 17

A galvanometer of resistance 90 is shunted by a resistance of 10 . The fraction of main current that passes through shunt is

MHT CET Medical 2026 Solution View → 18

An unknown resistance wire in the left gap of a meter bridge balances a 10 resistance in the right gap at a point that divides the bridge wire in a ratio 3:2 . If the length of thi

MHT CET Medical 2026 Solution View → 19

In a Wheatstone's bridge, three resistance 'Q', 'R' and 'S' are connected in three arms and first arm is formed by three resistances ' P₁ ', ' P₂ ' and ' P₃ ' in parallel. The cond

MHT CET Medical 2026 Solution View → 20

A galvanometer having a coil resistance of 100 gives a full scale deflection when a current of 1 mA is passed through it. The value of the resistance which can convert this galvano

MHT CET Medical 2026 Solution View → 21

In a Wheatstone's metre bridge, resistances R and S are connected in left and right gap, null point is obtained as l . After interchanging the resistances in the gaps, null point s

MHT CET Medical 2026 Solution View → 22

A closed loop consists of a 15 V battery, a 5 V battery (opposing the first), and a 25 resistor. The current through the loop is

MHT CET Medical 2026 Solution View → 23

A galvanometer of resistance 100 gives full scale deflection for a current of 1 mA. It is converted into an ammeter of range 0 - 10 A. The shunt required is :

NEET 2026 Solution View → 24

A room heater is rated 400 W, 220 V. If the supply voltage drops to 200 V, what will be the power consumed (approximately) ?

NEET 2026 Solution View → 25

A resistor is connected to a battery of 12 V emf and internal resistance 2 . If the current in the circuit is 0.6 A, the terminal voltage of the battery is :

NEET 2026 Solution View → 26

Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance, + , while the other one has a negative temperature

NEET 2026 Solution View → 27

A uniform metallic wire having resistance 4 is bent to form a square loop (ABCD) (see figure). A resistance of 2 is connected between points B and D and a battery of 2 V is connect

NEET 2026 Solution View → 28

In a metre bridge experiment (see figure), the positions of the cell, E , and galvanometer, G , are interchanged. We shall observe in the galvanometer :

NEET 2026 Solution View → 29

A wire of resistance R is cut into 8 equal pieces. From these pieces two equivalent resistances are made by adding four of these together in parallel. Then these two sets are added

NEET 2025 Solution View → 30

The current passing through the battery in the given circuit, is :

NEET 2025 Solution View → 31

A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is :-

NEET 2025 Solution View → 32

A uniform wire of diameter d carries a current of 100 mA when the mean drift velocity of electrons in the wire is v . For a wire of diameter d 2 of the same material to carry a cur

NEET 2024 Solution View → 33

In an electrical circuit, the voltage is measured as V=(200 4) volt and the current is measured as I=(20 0.2) A . The value of the resistance is:

NEET 2024 Solution View → 34

The given circuit shows a uniform straight wire A B of 40 cm length fixed at both ends. In order to get zero reading in the galvanometer G , the free end of J is to be placed from

NEET 2024 Solution View → 35

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Houses made of concrete roofs overlaid with foam keep the room ho

NEET 2024 Solution View → 36

A uniform metal wire of length / has 10 resistance. Now this wire is stretched to a length 2 / and then bent to form a perfect circle. The equivalent resistance across any arbitrar

NEET 2024 Solution View → 37

The terminal voltage of the battery, whose emf is 10 V and internal resistance 1 , when connected through an external resistance of 4 as shown in the figure is:

NEET 2024 Solution View → 38

A wire of length ' 1 and resistance 100 is divided into 10 equal parts. The first 5 parts are connected in series while the next 5 parts are connected in parallel. The two combinat

NEET 2024 Solution View → 39

Choose the correct circuit which can achieve the bridge balance.

NEET 2024 Solution View → 40

On the basis of electrical conductivity, which one of the following material has the smallest resistivity?

NEET 2023 Solution View → 41

A copper wire of radius 1 ~mm contains 10²² free electrons per cubic metre. The drift velocity for free electrons when 10 ~A current flows through the wire will be (Given, charge o

NEET 2023 Solution View → 42

The emf of a cell having internal resistance 1 is balanced against a length of 330 ~cm on a potentiometer wire. When an external resistance of 2 is connected across the cell, the b

NEET 2023 Solution View → 43

If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by:

NEET 2023 Solution View → 44

Resistance of a carbon resistor determined from colour codes is ( 22000 ± 5 % ) Ω . The colour of the third band must be :

NEET 2023 Solution View → 45

The magnitude and direction of the current in the following circuit is

NEET 2023 Solution View → 46

10 resistors, each of resistance R are connected in series to a battery of emf E and negligible internal resistance. Then those are connected in parallel to the same battery, the c

NEET 2023 Solution View → 47

A certain wire A has resistance 81 . The resistance of another wire B of same material and equal length but of diameter thrice the diameter of A will be

NEET 2023 Solution View → 48

The resistance of platinum wire at 0   ° C is 2   Ω and 6 . 8   Ω at 80   ° C . The temperature coefficient of resistance of the wire is:

NEET 2023 Solution View → 49

A cell of emf 4 ~V and internal resistance 0.5 is connected to a 7.5 external resistance. The terminal potential difference of the cell is:

NEET 2022 Solution View → 50

The equivalent resistance of the infinite network given below is:

NEET 2022 Solution View → 51

The reciprocal of resistance is:

NEET 2022 Solution View → 52

The sliding contact C is at one fourth of the length of the potential wire (A B) from A as shown in the circuit diagram. If the resistance of the wire A B is R₀ , then the potentia

NEET 2022 Solution View → 53

As the temperature increases, the electrical resistance

NEET 2022 Solution View → 54

Two resistors of resistance, 100   Ω and 200   Ω are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in 100   &#9

NEET 2022 Solution View → 55

A Wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X , th

NEET 2022 Solution View → 56

A copper wire of length 10   m and radius 10 - 2 π m has electrical resistance of 10 Ω . The current density in the wire for an electric field strength of 10  

NEET 2022 Solution View → 57

In a potentiometer circuit a cell of EMF 1 . 5   V gives balance point at 36   cm length of wire. If another cell of EMF 2 . 5   V replaces the first cell, then at w

NEET 2021 Solution View → 58

The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0 . 25   Ω . What will be

NEET 2021 Solution View → 59

Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities.

NEET 2021 Solution View → 60

Three resistors having resistances r 1 ,   r 2 and r 3 are connected as shown in the given circuit. The ratio i 3 i 1 of currents in terms of resistances used in the circuit i

NEET 2021 Solution View → 61

For the circuit shown in the figure, the current I will be

NEET 2020 Solution View → 62

For the circuit given below, the Kirchhoff's loop rule for the loop B C D E B is given by the equation

NEET 2020 Solution View → 63

The equivalent resistance between A and B for the mesh shown in the figure is

NEET 2020 Solution View → 64

Which of the following graph represents the variation of resistivity ρ with temperature T for copper?

NEET 2020 Solution View → 65

The colour code of a resistance is given below The values of resistance and tolerance, respectively, are

NEET 2020 Solution View → 66

A resistance wire connected in the left gap of a metre bridge balances a 10   Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3 : 2 .

NEET 2020 Solution View → 67

A charged particle having drift velocity of 7.5 × 10 − 4   m   s − 1 in an electric field of 3 × 10 − 10   V   m − 1 , has a m

NEET 2020 Solution View → 68

Two solid conductors are made up of same material, have same length and same resistance. One of them has a circular cross section of area A 1 and the other one has a square cross s

NEET 2020 Solution View → 69

Assertion : If the length of the conductor is doubled, the drift velocity will become half of the original value (keeping potential difference unchanged). Reason : At constant pote

AIIMS 2019 Solution View → 70

Assertion : A 60 ~W -220 ~V bulb glows more than a 100 ~W -220 ~V bulb when they are connected in series across a potential difference. Reason : When they are connected in series,

AIIMS 2019 Solution View → 71

The current density in a solid cylindrical wire of radius R , as a function of radial distance r is given by J(r)=J₀ (1- r R ) . The total current in the radial region r=0 to r= R

AIIMS 2019 Solution View → 72

If resistivity of copper is 1.72 10⁻⁸ - m and number of free electrons in copper is 8.5 10²⁸ / m ^3 . Find the mobility.

JIPMER 2019 Solution View → 73

In the given circuit, if power rating of heater is 1000 Watt at 100 Volt, find the resistance R in figure so that heater produces power of 62.5 W.

JIPMER 2019 Solution View → 74

A galvanometer of 50 resistance has 25 divisions. A current of 4 10⁻⁴ A gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 V , i

JIPMER 2019 Solution View → 75

Find the current in the 8 resistance in the given circuit.

JIPMER 2019 Solution View → 76

A circuit contain two resistance R₁ and R₂ in series. Find the ratio of input voltage to voltage of R ₂ .

JIPMER 2019 Solution View → 77

In the given circuit, find voltage across 12 resistance.

JIPMER 2019 Solution View → 78

The reading of an ideal voltmeter in the circuit shown is

NEET 2019 Solution View → 79

The meter bridge shown in the balance position with P Q = l ₁ l ₂ . If we now interchange the positions of galvanometer and cell, will the bridge work? If yes, that will be balance

NEET 2019 Solution View → 80

In the circuits shown below, the readings of the voltmeters and the ammeters will be,

NEET 2019 Solution View → 81

Six similar bulbs are connected as shown in the figure with a DC source of emf E , and zero internal resistance. The ratio of power consumption by the bulbs when i all are glowing

NEET 2019 Solution View → 82

A galvanometer of resistance 100 is converted to a voltmeter of range 10 ~V by connecting a resistance of 10 k . The resistance required to convert the same galvanometer to an amme

AIIMS 2018 Solution View → 83

In the circuit shown, the current through the 5 resistor is

AIIMS 2018 Solution View → 84

Assertion : A current flows in a conductor only when there is an electric field within the conductor. Reason : The drift velocity of electron in presence of electric field decrease

AIIMS 2018 Solution View → 85

In a potentiometer experiment of a cell of emf 1.25 ~V gives balancing length of 30 ~cm . If the cell is replaced by another cell, balancing length is found to be 40 ~cm . What is

AIIMS 2018 Solution View → 86

Find V_P-V_Q in the circuit shown in figure.

JIPMER 2018 Solution View → 87

Find i in shown figure

JIPMER 2018 Solution View → 88

Find current (i) in circuit shown in figure.

JIPMER 2018 Solution View → 89

Find R_ net between A and B .

JIPMER 2018 Solution View → 90

A current i is flowing through the wire of diameter (d) having drift velocity of electrons v _ d in it. What will be new drift velocity when diameter of wire is made d / 4 ?

JIPMER 2018 Solution View → 91

A carbon resistor of 47 ± 4.7   kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be:

NEET 2018 Solution View → 92

A set of n equal resistances, of value R each, are connected in series to a battery of emf E and internal resistances R . The current drawn is I . Now, the n resistance are connect

NEET 2018 Solution View → 93

A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are

NEET 2018 Solution View → 94

Current sensitivity of a moving coil galvanometer is 5  d i v / m A and its voltage sensitivity (angular deflection per unit voltage applied) is 20  d i v / V . The resis

NEET 2018 Solution View → 95

Assertion : An electrical bulb starts glowing instantly as it is switched on. Reason : Drift speed of electrons in a metallic wire is very large.

AIIMS 2017 Solution View → 96

A meter bridge is set-up as shown, to determine an unknown resistance X using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 ~cm mark. The

AIIMS 2017 Solution View → 97

The measurement of voltmeter in the following circuit is

AIIMS 2017 Solution View → 98

A and B are two points on a uniform ring of resistance R . The A C B= , where C is the centre of the ring. The equivalent resistance between A and B is

AIIMS 2017 Solution View → 99

To reduce the range of voltmeter, its resistance need to be reduced. A voltmeter has resistance R₀ and range V . Which of the following resistances when connected in parallel will

JIPMER 2017 Solution View → 100

You are given resistance wire of length 50 cm and a battery of negligible resistance. In which of the following cases is largest amount of heat generated?

JIPMER 2017 Solution View → 101

N lamps each of resistance r , are fed by a machine of resistance R . If light emitted by any lamp is proportional to the square of the heat produced, prove that the most efficient

JIPMER 2017 Solution View → 102

The resistance of a wire is R ohm. If it is melted and stretched to n times its original length, its new resistance will be

NEET 2017 Solution View → 103

A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves:

NEET 2017 Solution View → 104

Ten identical cells each of potential E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read

AIIMS 2016 Solution View → 105

On increasing the temperature of a conductor, its resistance increases because the

AIIMS 2016 Solution View → 106

A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor?

AIIMS 2016 Solution View → 107

A voltmeter of resistance 20000 reads 5 volt. To make it read 20 volt, the extra resistance required is

AIIMS 2016 Solution View → 108

Two batteries of emf 3 V and 6 V with internal resistances 2 and 4 are connected in a circuit with resistance of 10 as shown in figure. The current and potential difference between

JIPMER 2016 Solution View → 109

A rod made up of metal is 1.2 m long and 0.8 cm in diameter. Its resistance is 3.5 10⁻³ . Another disc made of the same metal is 2.0 cm in diameter and 1.25 mm thick. What is the r

JIPMER 2016 Solution View → 110

A galvanometer of resistance 25 shows a deflection of 5 divisions when a current of 2 mA is passed through it. If a shunt of 4 is connected and there are 20 divisions on the scale,

JIPMER 2016 Solution View → 111

The length of a given cylindrical wire is increased by 150 % . Due to the consequent decrease in diameter the change in the resistance of the wire will be

JIPMER 2016 Solution View → 112

In the given figure, potential difference between A and B is

JIPMER 2016 Solution View → 113

The potential difference V A - V B between the points A and B in the given figure is

NEET 2016 Solution View → 114

A filament bulb ( 500   W ,   100   V ) is to be used in a 230   V main supply. When a resistance, R is connected in series, it works perfectly and the bulb con

NEET 2016 Solution View → 115

The charge flowing through a resistance R varies with time t as Q = a t - b t 2 where a and b are positive constants. The total heat produced in R is:

NEET 2016 Solution View → 116

A potentiometer wire is 100   cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in o

NEET 2016 Solution View → 117

What is the equivalent resistance between A and B in given figure?

AIIMS 2015 Solution View → 118

When a current is passed in a conductor, 5^ C rise in temperature is observed. If the strength of current is made thrice, rise in temperature will be

AIIMS 2015 Solution View → 119

A wire of resistance 10 is bent to form a complete circle. Find its resistance between two diametrically opposite point.

JIPMER 2015 Solution View → 120

Find the resistance of a hollow cylindrical conductor of length 1.0 mm and 2.0 mm respectively. The resistivity of the material is 2.0 10⁻⁸ m .

JIPMER 2015 Solution View →
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