Electromagnetic Induction PYQs - Last 5 Years
JEE Main / Physics / Electricity / 83 recent questions
PhysicsElectricity2022-2026
Practice 83 JEE Main Physics questions from Electromagnetic Induction. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 5 Years Electromagnetic Induction Questions
Showing 50 of 83 filtered questions.
1Electromagnetic Induction
A 30 cm long solenoid has 10 turns per cm and area of $5 \mathrm{~cm}^2$. The current through the solenoid coil varies from 2 A to 4 A in 3.14 s . The e.m.f. induced in the coil is $\alpha \times 10^{-5} \mathrm{~V}$. The value $\alpha$ is ...
MCQ+4 / -12026
2Electromagnetic Induction
An inductor of inductance 10 mH having resistance of $100 \Omega$ is connected to battery of E.M.F. 1.0 V through a switch as shown in the figure below. After switch is closed, the ratio of instantaneous voltages across the inductor when th...
MCQ+4 / -12026
3Electromagnetic Induction
A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as $B=0.4 \sin (300 t)$ Tesla. The normal to the plane of loop makes an angle of $60^{\circ}$ with the field. The maximum induced emf produced in the loop ...
MCQ+4 / -12026
4Electromagnetic Induction
In the given circuit below inductance values of $L_1, L_2$ and $L_3$ are same. The magnetic energy stored in the entire circuit is $\left(U_t\right)$ and that stored in the $\mathrm{L}_2$ inductor is $\left(U_l\right)$. $U_t / U_l$ is $\_\_...
INTEGER+4 / -12026
5Electromagnetic Induction
A metal rod of length $L$ rotates about one end at origin with a uniform angular velocity $\omega$. The magnetic field radially falls off as $B(\mathrm{r})=B_{\mathrm{o}} \mathrm{e}^{-\lambda r} ; \lambda$ being a positive constant. The emf...
MCQ+4 / -12026
6Electromagnetic Induction
A circular loop of radius 20 cm and resistance $2 \Omega$ is placed in a time varying magnetic field $\vec{B}=\left(2 t^2+2 t+3\right) T$. At $t=0$, for the plane of the loop being perpendicular to the magnetic field and, the induced curren...
INTEGER+4 / -12026
7Electromagnetic Induction
When a coil is placed in a time dependent magnetic field the power dissipated in it is $P$. The number of turns, area of the coil and radius of the coil wire are $N$, $A$ and $r$ respectively. For a second coil number of turns, area of the ...
MCQ+4 / -12026
8Electromagnetic Induction
A circular current loop of radius $R$ is placed inside square loop of side length $L$ ($L \gg R$) such that they are co-planar and their centers coincide. The permeability of free space is $\mu_0$. The mutual inductance between circular loo...
MCQ+4 / -12026
9Electromagnetic Induction
\(\text { Match the LIST-I with LIST-II }\)
List-I
List-II
A.
Magnetic induction
I.
M
L
MCQ+4 / -12026
List-I
List-II
A.
Magnetic induction
I.
10Electromagnetic Induction
A simple pendulum made of mass 10 g and a metallic wire of length 10 cm is suspended vertically in a uniform magnetic field of 2 T . The magnetic field direction is perpendicular to the plane of oscillations of the pendulum. If the pendulum...
INTEGER+4 / -12026
11Electromagnetic Induction
A 20 m long uniform copper wire held horizontally is allowed to fall under the gravity $\left(g=10 \mathrm{~m} / \mathrm{s}^2\right)$ through a uniform horizontal magnetic field of 0.5 Gauss perpendicular to the length of the wire. The indu...
MCQ+4 / -12026
12Electromagnetic Induction
Suppose a long solenoid of 100 cm length, radius 2 cm having 500 turns per unit length, carries a current $I=10 \sin (\omega \mathrm{t}) \mathrm{A}$, where $\omega=1000 \mathrm{rad} . / \mathrm{s}$. A circular conducting loop $(B)$ of radiu...
MCQ+4 / -12026
13Electromagnetic Induction
A circular loop of radius 7 cm is placed in uniform magnetic field of 0.2 T directed perpendicular to plane of loop. The loop is converted into a square loop in 0.5 s . The EMF induced in the loop is $\_\_\_\_$ mV.
MCQ+4 / -12026
14Electromagnetic Induction
$X P Q Y$ is a vertical smooth long loop having a total resistance $R$ where $P X$ is parallel to $Q Y$ and separation between them is $l$. A constant magnetic field $B$ perpendicular to the plane of the loop exists in the entire space. A r...
MCQ+4 / -12026
15Electromagnetic Induction
Three identical coils $C_1, C_2$ and $C_3$ are closely placed such that they share a common axis. $C_2$ is exactly midway. $C_1$ carries current $I$ in anti-clockwise direction while $C_3$ carries current $I$ in clockwise direction. An indu...
MCQ+4 / -12026
16Electromagnetic Induction
Inductance of a coil with $10^4$ turns is 10 mH and it is connected to a dc source of 10 V with internal resistance of $10 \Omega$. The energy density in the inductor when the current reaches $\left(\frac{1}{e}\right)$ of its maximum value ...
INTEGER+4 / -12026
17Electromagnetic Induction
A conducting circular loop is rotated about its diameter at a constant angular speed of $100 \mathrm{rad} / \mathrm{s}$ in a magnetic field of 0.5 T perpendicular to the axis of rotation. When the loop is rotated by $30^{\circ}$ from the ho...
INTEGER+4 / -12026
18Electromagnetic Induction
Figure shows the circuit that contains three resistances ( $9 \Omega$ each) and two inductors ( 4 mH each). The reading of ammeter at the moment switch $K$ is turned ON , is $\_\_\_\_$ A.
MCQ+4 / -12026
19Electromagnetic Induction
A conducting circular loop of area $1.0 \mathrm{~m}^2$ is placed perpendicular to a magnetic field which varies as $B=\sin (100 t)$ Tesla. If the resistance of the loop is $100 \Omega$, then the average thermal energy dissipated in the loop...
MCQ+4 / -12026
20Electromagnetic Induction
A 1 m long metal rod AB completes the circuit as shown in figure. The area of circuit is perpendicular to the magnetic field of 0.10 T . If the resistance of the total circuit is $2 \Omega$ then the force needed to move the rod towards righ...
MCQ+4 / -12026
21Electromagnetic Induction
Conductor wire ABCDE with each arm 10 cm in length is placed in magnetic field of $\frac{1}{\sqrt{2}}$ Tesla, perpendicular to its plane. When conductor is pulled towards right with constant velocity of $10 \mathrm{~cm} / \mathrm{s}$, induc...
INTEGER+4 / -12025
22Electromagnetic Induction
Consider I1 and I2 are the currents flowing simultaneously in two nearby coils 1 & 2, respectively. If L1 = self inductance of coil 1, M12 = mutual inductance of coil 1 with respect to coil 2, then the value of induced emf in coil 1 will be...
MCQ+4 / -12025
23Electromagnetic Induction
A coil of area A and N turns is rotating with angular velocity $\omega$ in a uniform magnetic field $\vec{B}$ about an axis perpendicular to $\vec{B}$. Magnetic flux $\varphi$ and induced emf $\varepsilon$ across it, at an instant when $\ve...
MCQ+4 / -12025
24Electromagnetic Induction
A conducting bar moves on two conducting rails as shown in the figure. A constant magnetic field B exists into the page. The bar starts to move from the vertex at time t = 0 with a constant velocity. If the induced EMF is E ∝ tn, then value...
INTEGER+4 / -12025
25Electromagnetic Induction
A uniform magnetic field of 0.4 T acts perpendicular to a circular copper disc 20 cm in radius. The disc is having a uniform angular velocity of 10 $ \pi $ rad s-1 about an axis through its centre and perpendicular to the disc. What is the ...
MCQ+4 / -12025
26Electromagnetic Induction
In the given circuit the sliding contact is pulled outwards such that electric current in the circuit changes at the rate of $8 \mathrm{~A} / \mathrm{s}$. At an instant when R is $12 \Omega$, the value of the current in the circuit will be...
INTEGER+4 / -12025
27Electromagnetic Induction
Regarding self-inductance:
A. The self-inductance of the coil depends on its geometry.
B. Self-inductance does not depend on the permeability of the medium.
C. Self-induced e.m.f. opposes any change in the current in a circuit.
D. Self-indu...
A. The self-inductance of the coil depends on its geometry.
B. Self-inductance does not depend on the permeability of the medium.
C. Self-induced e.m.f. opposes any change in the current in a circuit.
D. Self-indu...
MCQ+4 / -12025
28Electromagnetic Induction
A rectangular metallic loop is moving out of a uniform magnetic field region to a field free region with a constant speed. When the loop is partially inside the magnate field, the plot of magnitude of induced emf $(\varepsilon)$ with time $...
MCQ+4 / -12025
29Electromagnetic Induction
A square loop of side \(15 \mathrm{~cm}\) being moved towards right at a constant speed of \(2\mathrm{~cm} / \mathrm{s}\) as shown in figure. The front edge enters the \(50 \mathrm{~cm}\) wide magnetic field at \(t=0\). The value of induced...
MCQ+4 / -12024
30Electromagnetic Induction
In a coil, the current changes from \(-2 \mathrm{~A}\) to \(+2 \mathrm{~A}\) in \(0.2 \mathrm{~s}\) and induces an emf of \(0.1 \mathrm{~V}\). The self inductance of the coil is :
MCQ+4 / -12024
31Electromagnetic Induction
Two conducting circular loops A and B are placed in the same plane with their centres coinciding as shown in figure. The mutual inductance between them is:
MCQ+4 / -12024
32Electromagnetic Induction
The current in an inductor is given by \(\mathrm{I}=(3 \mathrm{t}+8)\) where \(\mathrm{t}\) is in second. The magnitude of induced emf produced in the inductor is \(12 \mathrm{~mV}\). The self-inductance of the inductor _________ $$\mathrm{...
INTEGER+4 / -12024
33Electromagnetic Induction
A small square loop of wire of side \(l\) is placed inside a large square loop of wire of side \(L\left(L=l^2\right)\). The loops are coplanar and their centers coincide. The value of the mutual inductance of the system is $$\sqrt{x} \times...
INTEGER+4 / -12024
34Electromagnetic Induction
A coil is places perpendicular to a magnetic field of \(5000 \mathrm{~T}\). When the field is changed to \(3000 \mathrm{~T}\) in \(2 \mathrm{~s}\), an induced emf of \(22 \mathrm{~V}\) is produced in the coil. If the diameter of the coil is...
MCQ+4 / -12024
35Electromagnetic Induction
The magnetic flux \(\phi\) (in weber) linked with a closed circuit of resistance \(8 \Omega\) varies with time (in seconds) as \(\phi=5 t^2-36 t+1\). The induced current in the circuit at \(t=2 \mathrm{~s}\) is __________ A.
INTEGER+4 / -12024
36Electromagnetic Induction
A ceiling fan having 3 blades of length \(80 \mathrm{~cm}\) each is rotating with an angular velocity of 1200 \(\mathrm{rpm}\). The magnetic field of earth in that region is \(0.5 \mathrm{G}\) and angle of dip is \(30^{\circ}\). The emf ind...
INTEGER+4 / -12024
37Electromagnetic Induction
Match List I with List II
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overflow:hidden;padding:10px 5px;word-break:normal;}
...
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overflow:hidden;padding:10px 5px;word-break:normal;}
...
MCQ+4 / -12024
38Electromagnetic Induction
A square loop of side \(10 \mathrm{~cm}\) and resistance \(0.7 \Omega\) is placed vertically in east-west plane. A uniform magnetic field of \(0.20 T\) is set up across the plane in north east direction. The magnetic field is decreased to z...
INTEGER+4 / -12024
39Electromagnetic Induction
Match List I with List II
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.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
...
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.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
...
MCQ+4 / -12024
40Electromagnetic Induction
A horizontal straight wire \(5 \mathrm{~m}\) long extending from east to west falling freely at right angle to horizontal component of earths magnetic field \(0.60 \times 10^{-4} \mathrm{~Wbm}^{-2}\). The instantaneous value of emf induced ...
INTEGER+4 / -12024
41Electromagnetic Induction
Two coils have mutual inductance \(0.002 \mathrm{~H}\). The current changes in the first coil according to the relation \(\mathrm{i}=\mathrm{i}_0 \sin \omega \mathrm{t}\), where \(\mathrm{i}_0=5 \mathrm{~A}\) and \(\omega=50 \pi\) rad/s. Th...
INTEGER+4 / -12024
42Electromagnetic Induction
A rectangular loop of length \(2.5 \mathrm{~m}\) and width \(2 \mathrm{~m}\) is placed at \(60^{\circ}\) to a magnetic field of \(4 \mathrm{~T}\). The loop is removed from the field in \(10 \mathrm{~sec}\). The average emf induced in the lo...
MCQ+4 / -12024
43Electromagnetic Induction
A rectangular loop of sides $12 \mathrm{~cm}$ and $5 \mathrm{~cm}$, with its sides parallel to the $x$-axis and $y$-axis respectively, moves with a velocity of $5 \mathrm{~cm} / \mathrm{s}$ in the positive $x$ axis direction, in a space con...
INTEGER+4 / -12024
44Electromagnetic Induction
A coil of 200 turns and area $0.20 \mathrm{~m}^2$ is rotated at half a revolution per second and is placed in uniform magnetic field of $0.01 \mathrm{~T}$ perpendicular to axis of rotation of the coil. The maximum voltage generated in the c...
INTEGER+4 / -12024
45Electromagnetic Induction
A transformer has an efficiency of $80 \%$ and works at $10 \mathrm{~V}$ and $4 \mathrm{~kW}$. If the secondary voltage is $240 \mathrm{~V}$, then the current in the secondary coil is :
MCQ+4 / -12024
46Electromagnetic Induction
Certain galvanometers have a fixed core made of non magnetic metallic material. The function of this metallic material is
MCQ+4 / -12023
47Electromagnetic Induction
An emf of \(0.08 \mathrm{~V}\) is induced in a metal rod of length \(10 \mathrm{~cm}\) held normal to a uniform magnetic field of \(0.4 \mathrm{~T}\), when moves with a velocity of:
MCQ+4 / -12023
48Electromagnetic Induction
The induced emf can be produced in a coil by
A. moving the coil with uniform speed inside uniform magnetic field
B. moving the coil with non uniform speed inside uniform magnetic field
C. rotating the coil inside the uniform magnetic field
...
A. moving the coil with uniform speed inside uniform magnetic field
B. moving the coil with non uniform speed inside uniform magnetic field
C. rotating the coil inside the uniform magnetic field
...
MCQ+4 / -12023
49Electromagnetic Induction
Two concentric circular coils with radii \(1 \mathrm{~cm}\) and \(1000 \mathrm{~cm}\), and number of turns 10 and 200 respectively are placed coaxially with centers coinciding. The mutual inductance of this arrangement will be ___________ $...
INTEGER+4 / -12023
50Electromagnetic Induction
Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following
{Assume negligible air friction}
{Assume negligible air friction}
MCQ+4 / -12023