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Electromagnetic Induction — NEET UG Physics PYQs

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

290 questionsPhysicsSolutions on every page
1

A square loop of area A is moving out of the uniform magnetic field (B) with constant velocity v . The EMF (e) induced in the loop is

MHT CET Medical 2026 Solution View → 2

The value of mutual inductance of two coils is 6 mH. The current in one of the coil changes from 7 A to 2 A in 0.2 second, so that e.m.f. is induced in the other coil. If the resis

MHT CET Medical 2026 Solution View → 3

Two identical inductors are connected in parallel. If the parallel combination stores 40 J of magnetic field energy when a total current of 2 A is passed through it, the value of t

MHT CET Medical 2026 Solution View → 4

Two coils have mutual inductance of 0.004 H . The current changes in the first coil according to the relation i = i₀ t , where i₀ = 6 A and = 100 rad/s . The maximum value of emf i

MHT CET Medical 2026 Solution View → 5

The coefficient of coupling is 0.8 . If the mutual inductance is 8 H , then the values of self-inductances L₁ and L₂ of the coil are

MHT CET Medical 2026 Solution View → 6

The self inductance L of a solenoid of length l and area of cross-section A, with a fixed number of turns N increases as

MHT CET Medical 2026 Solution View → 7

A wire of length 1 m is moving at a speed of 2 m/s perpendicular to its length in a homogeneous magnetic field of 0.5 T . If the ends of the wire are joined to a circuit of resista

MHT CET Medical 2026 Solution View → 8

Semicircular wire of radius R is rotated in a uniform magnetic field about an axis passing through its ends. If the frequency of rotation is f, the amplitude of induced e.m.f. in t

MHT CET Medical 2026 Solution View → 9

A wire of length l in the form of a square loop is in a plane normal to magnetic field B. If the length of the wire is decreasing at the rate dl dt , the e.m.f. induced is e₁ . If

MHT CET Medical 2026 Solution View → 10

A very small circular loop of radius 'a' is initially (at t = 0 ) coplanar and concentric with a much larger fixed circular loop of radius 'b'. A constant current I flows in the la

MHT CET Medical 2026 Solution View → 11

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ the speed of ring is V and emf develope

MHT CET Medical 2026 Solution View → 12

A magnetic field induction is changing in magnitude at a constant rate dB dt . The plane of a circular loop of radius r of copper wire (mass m and radius a ) is placed perpendicula

MHT CET Medical 2026 Solution View → 13

When four inductors of the same inductances L are connected in series, and I is the current passing through the circuit. The energy stored in the circuit is

MHT CET Medical 2026 Solution View → 14

The self-inductance L of a toroid having circular cross-section of radius r and major radius R is ( r R )

MHT CET Medical 2026 Solution View → 15

In an a.c. generator, a rectangular coil of 1000 turns each having area 10⁻² m ^2 is rotated at 180 r.p.m. about an axis perpendicular to a uniform magnetic field of magnitude 2 T.

MHT CET Medical 2026 Solution View → 16

Two conducting circular loops of radii R₁ and R₂ are placed in same plane with their centers coinciding. If R₁ > R₂ and current I is flowing through the circular loop of radius R₁

MHT CET Medical 2026 Solution View → 17

A conducting rod AB is in contact with metal rails AC and BD, which are 0.25 m apart in a uniform magnetic field of induction 0.4 T acting perpendicular to the plane of the figure.

MHT CET Medical 2026 Solution View → 18

A square loop (side a ) rotates in a uniform magnetic field B perpendicular to the rotation axis. What is the maximum induced EMF ( e_ max ) and the first angle (between magnetic f

MHT CET Medical 2026 Solution View → 19

Average e.m.f. of 2.4 V is induced in a coil when a current in it is changed from 10 A in one direction to 10 A in opposite direction in 0.4 second. The self inductance of the coil

MHT CET Medical 2026 Solution View → 20

A metal rod of length ' l ' rotates about one of its ends in a plane perpendicular to a magnetic field of induction 'B'. If the emf induced between the ends of the rod is 'e', then

MHT CET Medical 2026 Solution View → 21

Two coils P and S have a mutual inductance of 5 10⁻³ H . If the current in the primary (P) is I = 10 (100 t) , then the maximum value of e.m.f. induced in S is (in volt)

MHT CET Medical 2026 Solution View → 22

The magnetic flux through a coil of resistance R changes by an amount in the time t . The total quantity of electric charge ( Q ) induced is

MHT CET Medical 2026 Solution View → 23

Identify the CORRECT statement

MHT CET Medical 2026 Solution View → 24

The north pole of the magnet is brought near a metallic ring as shown in figure. The direction of induced current in the ring (if looked from upside) will be

MHT CET Medical 2026 Solution View → 25

A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B as shown in the figure. The potential difference developed

MHT CET Medical 2026 Solution View → 26

A metallic rod of length 'l' is tied to a string of length '2l' and made to rotate with angular speed '2 ' on a horizontal table with one end of the string fixed. If there exists a

MHT CET Medical 2026 Solution View → 27

The current in a primary coil of a step-down transformer having N_p turns is given by i = i₀ t . The secondary coil of having N_s turns is wound over the primary coil. The emf indu

MHT CET Medical 2026 Solution View → 28

The variation of induced emf (E) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as North pole is situated at lef

MHT CET Medical 2026 Solution View → 29

Two coils P and Q are kept near each other. When no current flows through coil P and currrent in coil Q increases at the rate of 10 A/s, the e.m.f. in coil P is 12 mV. When coil Q

MHT CET Medical 2026 Solution View → 30

If ' N ' is the number of turns in a circular coil, the value of its self-inductance varies as

MHT CET Medical 2026 Solution View → 31

Consider a long solenoid of length l and radius r . If n is the number of turns per unit length and ₀ is the permeability of free space, the inductance of the solenoid is :

NEET 2026 Solution View → 32

Two identical inductors are connected in two different configurations P and Q, where a time varying current I(t) is flowing, as shown in the figure. The induced emf between points

NEET 2026 Solution View → 33

A conducting loop of finite resistance lies on the x - y plane. There is a constant magnetic field in the z direction. The area of the loop varies with time t , as A=A₀(1+ t) in ap

NEET 2026 Solution View → 34

A rectangular wire loop of sides 8 cm and 3 cm with a small cut, is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the plane of the loop. Th

NEET 2026 Solution View → 35

AB is a part of an electrical circuit (see figure). The potential difference " V _ A - V _ B ", at the instant when current i =2 ~A and is increasing at a rate of 1 amp / second is

NEET 2025 Solution View → 36

Let us consider two solenoids A and B , made from same magnetic material of relative permeability _r and equal area of cross-section. Length of A is twice that of B and the number

NEET 2024 Solution View → 37

In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are thr

NEET 2024 Solution View → 38

The magnetic energy stored in an inductor of inductance 4   μH carrying a current of 2   A is:

NEET 2023 Solution View → 39

An emf is generated by an ac generator having 100 turn coil, of loop area 1 ~m ^2 . The coil rotates at a speed of one revolution per second and placed in a uniform magnetic field

NEET 2023 Solution View → 40

The net magnetic flux through any closed surface is:

NEET 2023 Solution View → 41

A square loop of side 1   m and resistance 1   Ω is placed in a magnetic field of 0 . 5   T . If the plane of loop is perpendicular to the direction of magnetic

NEET 2022 Solution View → 42

A big circular coil of 1000 turns and average radius 10   m is rotating about its horizontal diameter at 2   rad   s - 1 . If the vertical component of earth's m

NEET 2022 Solution View → 43

The magnetic flux linked to a circular coil of radius R is: =2 t^3+4 t^2+2 t+5 ~Wb The magnitude of induced emf in the coil at t=5 ~s is:

NEET 2022 Solution View → 44

Two conducting circular loops of radii R 1 and R 2 are placed in the same plane with their centres coinciding. If R 1 ≫ R 2 , the mutual inductance M between them will be dir

NEET 2021 Solution View → 45

The magnetic flux linked with a coil (in Wb ) is given by the equation ϕ = 5 t 2 + 3 t + 16 . The magnitude of induced emf in the coil at the fourth second will be:

NEET 2020 Solution View → 46

A wheel with 20 metallic spokes each 1   m long is rotated with a speed of 120   rpm in a plane perpendicular to a magnetic field of 0 . 4   G . The induced emf betw

NEET 2020 Solution View → 47

For a toroid N=500 , radius =40 ~cm , and area of cross section =10 ~cm ^2 . Find inductance.

AIIMS 2019 Solution View → 48

Assertion: A metallic surface is moved in and moved out in a magnetic field, then emf is induced in it. Reason : Eddy current will be produced in a metallic surface moving in and o

AIIMS 2019 Solution View → 49

A uniform coil of self-inductance 1.8 10⁻⁴ H and resistance 6 is broken up into two identical coils. These two coils are then connected in parallel across a 12 ~V battery. The circ

AIIMS 2019 Solution View → 50

For a battery the electromotive force is 1.5 V . Terminal voltage is 1.25 V . Power supplied to external resistance is 2.5 W . Find the internal resistance of battery.

JIPMER 2019 Solution View → 51

Lenz law is based on principle of conservation of

JIPMER 2019 Solution View → 52

The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC? (a) (b) (c) (d)

NEET 2019 Solution View → 53

A 800 turn coil of the effective area 0.05    m 2 is kept perpendicular to the magnetic field 5 × 10 - 5    T . When the plane of the coil is rotated b

NEET 2019 Solution View → 54

A cycle wheel of radius 0.5 ~m is rotated with constant angular velocity of 10 rad / s in a region of magnetic field of 0.1 ~T which is perpendicular to the plane of the wheel. The

NEET 2019 Solution View → 55

In which of the following devices, the eddy current effect is not used?

NEET 2019 Solution View → 56

Two identical circular coils A and B are kept on a horizontal tube side by side without touching each other. If the current in the coil A increases with time, in response, the coil

AIIMS 2018 Solution View → 57

A circular ring of diameter 20 ~cm has a resistance of 0.01 . The charge that will flow through the ring if it is turned from a position perpendicular to a uniform magnetic field o

AIIMS 2018 Solution View → 58

Assertion : Only a change in magnetic flux will maintain an induced current in the coil. Reason : The presence of large magnetic flux through a coil maintains a current in the coil

AIIMS 2018 Solution View → 59

The radius of the circular conducting loop shown in figure is R . Magnetic field is decreasing at a constant rate . Resistance per unit length of the loop is . Then current in wire

AIIMS 2018 Solution View → 60

As shown in figure, two vertical conducting rails separated by distance 1.0 ~m are placed parallel to z -axis. At z=0 , a capacitor of 0.15 ~F is connected between the rails and a

AIIMS 2017 Solution View → 61

For MRI, a patient is slowly pushed in a time of 10 ~s within the coils of the magnet where magnetic field is B=2.0 ~T . If the patient's trunk is 0.8 ~m in circumference, the indu

AIIMS 2017 Solution View → 62

A circular coil of radius 10 ~cm , 500 turns and resistance 2 is placed with its plane perpendicular to the horizontal component of the earth's magnetic field. It is rotated about

AIIMS 2017 Solution View → 63

A long solenoid of diameter 0 . 1   m has 2 × 10 4 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0 . 01   m is placed with its axis

NEET 2017 Solution View → 64

In the given figure what will be the coefficient of mutual inductance

JIPMER 2016 Solution View → 65

A uniform magnetic field is restricted within a region of radius, r . The magnetic field changes with time at a rate, d B → d t . Loop one of radius R > r encloses the re

NEET 2016 Solution View → 66

A long solenoid has 1000 turns. When a current of 4 A flows through it the magnetic flux linked with each turn of the solenoid is 4 × 10 - 3  Wb. The self-inductance of t

NEET 2016 Solution View → 67

The self inductance of a coil having 400 turns is 10 mH . The magnetic flux through the cross section of the coil corresponding to current 2 ~mA is

AIIMS 2015 Solution View → 68

Assertion : An emf is induced in a closed loop when magnetic flux is varied. The induced electric field E is not a conservative field. Reason : The line integral E d l around the c

AIIMS 2015 Solution View → 69

Mutual inductance of two coils can be increased by

AIIMS 2015 Solution View → 70

The magnetic flux through each turn of a coil having 200 turns is given as (t^2-2 t ) 10⁻³ Wb , where t is in second. The emf induced in the coil at t=3 ~s is

JIPMER 2015 Solution View → 71

A conducting square frame of side a and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant v

NEET 2015 Solution View → 72

Two conducting circular loops of radii R₁ and R₂ are placed in the same plane with their centres coinciding. If R₁>R₂ , the mutual inductance M between them will be directly propor

AIIMS 2014 Solution View → 73

A thin semicircular conducting ring P Q R of radius r is falling with its plane vertical in a horizontal magnetic field B , as shown in figure. The potential difference developed a

NEET 2014 Solution View → 74

Which of the following is the best method toreduce eddy currents ?

AIIMS 2013 Solution View → 75

Two solenoids of equal number of turns having their length and the radii in the same ratio 1: 2 . The ratio of their self-inductance will be

AIIMS 2013 Solution View → 76

In 0.2 s, the current in a coil increases from 2.0 A to 3.0 A. If inductance of coil is 60 mH, then induced current in external resistance of 3 will be

JIPMER 2013 Solution View → 77

A current of 2.5 ~A flows through a coil of inductance 5 H . The magnetic flux linked with the coil is:

NEET 2013 Solution View → 78

A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced emf is

NEET 2013 Solution View → 79

The thermo emf of a hypothetical thermocouple varies with the temperature of hot junction as E=a +b ^2 in volts, where the ratio a b is 700^ C . If the cold junction is kept at 0^

JIPMER 2012 Solution View → 80

In a coil of resistance 10 , the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through t

NEET 2012 Solution View → 81

A coil of resistance 400 is placed in a magnetic field. If the magnetic flux ( Wb ) linked with the coil varies with time t (sec) as =50 t^2+4 The current in the coil at t=2 ~s is

NEET 2012 Solution View → 82

Magnetic energy per unit volume is represented by

AIIMS 2011 Solution View → 83

Lenz law is consistent with conservation of

AIIMS 2011 Solution View → 84

Mutual inductance M between two concentric coils of radii 1 ~m and 2 ~m is

AIIMS 2011 Solution View → 85

Induced emf in the coil depends upon

JIPMER 2011 Solution View → 86

The current i in a coil varies with time as shown in the figure. The variation of induced emf with time would be

NEET 2011 Solution View → 87

A circular coil with a cross-sectional area of 4 ~cm ^2 has 10 turns. It is placed at the center of a long solenoid that has 15 turns / cm and a crosssectional area of 10 ~cm ^2 ,

AIIMS 2010 Solution View → 88

In 0.1 s , the current in a coil increases from 1 A to 1.5A. If inductance of coil is 60 mH , then induced current in external resistance of 3 will be

JIPMER 2010 Solution View → 89

The impedance of a circuit, when a resistance R and an inductor of inductance L are connected in series in an AC circuit of frequency f , is

JIPMER 2010 Solution View → 90

A thin ring of radius R metre has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induct

NEET 2010 Solution View → 91

A conducting circular loop is placed in a uniform magnetic field, B=0.025 ~T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate o

NEET 2010 Solution View → 92

A coil of wire of a certain radius has 100 turns and a self inductance of 15 mH . The self inductance of a second similar coil of 500 turns will be

AIIMS 2009 Solution View → 93

A coil of inductance 300 mH and resistance 2 is connected to a source of voltage 2 V . The current reaches half of its steady state value in

JIPMER 2009 Solution View → 94

A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity, v = vi. The magnetic field

NEET 2009 Solution View → 95

A conducting circular loop is placed in a uniform magnetic field 0.04 ~T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 ~mm / s .

NEET 2009 Solution View → 96

A conducting circular loop is placed in a uniform magnetic field 0.04 ~T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mms ⁻¹ . T

NEET 2009 Solution View → 97

A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity, V =v i . The magnetic field

NEET 2009 Solution View → 98

Assertion : Inductance coils are usually made of thick copper wire. Reason : Induced current is more in wire having less resistance.

AIIMS 2008 Solution View → 99

A long solenoid has 500 turns. When a current of 2 ~A is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4 10⁻³ ~Wb . The self-inductance of

NEET 2008 Solution View → 100

A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction linked with the disc is

NEET 2008 Solution View → 101

A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4 10⁻³ b . The selfinductance o

NEET 2008 Solution View → 102

A circular disc of radius 0.2 ~m is placed in a uniform magnetic field of induction 1 ( W b m^2 ) in such a way that its axis makes an angle of 60^ with B . The magnetic flux linke

NEET 2008 Solution View → 103

Faraday law of electrolysis indirectly shows

AIIMS 2007 Solution View → 104

With the decrease of current in the primary coil from 2 amperes to zero value in (0.01 ~s ) the emf generated in the secondary coil is 1000 volts. The mutual inductance of the two

AIIMS 2007 Solution View → 105

Two coils of self inductance 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these

NEET 2006 Solution View → 106

A conducting ring of radius 1 meter is placed in a uniform magnetic field B of 0.01 tesla oscillating with frequency 100 ~Hz with its plane at right angle to B . What will be the i

AIIMS 2005 Solution View → 107

A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of e.m.f. generated across the coil during

AIIMS 2005 Solution View → 108

If the current 3 A flowing in the primary coil is made zero in 0.1 sec, the emf induced in the secondary coil is 1.5 volt. The mutual inductance between the coils is

JIPMER 2004 Solution View → 109

A circular coil of mean radius of 7 cm and having 4000 turns is rotated at the rate of 1800 revolutions per minute in the earth's magnetic field (B=0.5 gauss), the emf induced in c

JIPMER 2004 Solution View → 110

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit

NEET 2004 Solution View → 111

The magnetic flux through a circuit of resistance R changes by an amount in a time t . Then the total quantity of electric charge Q that passes any point in the circuit during the

NEET 2004 Solution View → 112

In an ideal parallel L C circuit, the capacitor is charged by connecting it to a d.c. source which is then disconnected. The current in the circuit

AIIMS 2003 Solution View → 113

Assertion : The possibility of an electric bulb fusing is higher at the time of switching on and off. Reason : Inductive effects produce a surge at the time of switch-off and switc

AIIMS 2003 Solution View → 114

The coefficient of mutual inductance, when magnetic flux changes by 2 10⁻² ~Wb and current changes by 0.01 ~A is

AIIMS 2002 Solution View → 115

Assertion : The quantity L / R possesses dimension of time. Reason : To reduce the rate of increase of current through a solenoid, we should increase the time constant (L / R) .

AIIMS 2002 Solution View → 116

Assertion : Faraday's laws are consequences of conservation of energy. Reason : In a purely resistive A.C. circuit, the current lags behind the e.m.f. in phase.

AIIMS 2002 Solution View → 117

At a place earth's magnetic field, 5 10^5 ~Wb / m ^2 is acting perpendicular to a coil of radius R=5 ~cm . If ₀ / 4 =10⁻⁷ , then how much current is induced in circular loop?

AIIMS 2001 Solution View → 118

If electron is moving from A to B in wire A B , then current induced in the coil is

AIIMS 2001 Solution View → 119

A small piece of metal wire is dragged across the gap between the pole pieces of a magnet in 0.4 sec . If magnetic flux between the pole pieces is known to be 8 10⁻⁴ ~Wb , then ind

AIIMS 2001 Solution View → 120

A bar magnet is passing through a conducting loop of radius R with velocity v . The radius of the bar magnet is such that it just passes through the loop. The induced e.m.f. in the

NEET Solution View →
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