JEE Main Electromagnetic Induction Practice Questions With Solutions

Updated By Diksha Sharma on 07 Jan, 2025 21:16

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JEE Main Physics Electromagnetic Induction Practice Questions

Chemistry Mathematics

Question 1.

A square loop of side $15 cm$ being moved towards right at a constant speed of $2 cm / s$ as shown in figure. The front edge enters the $50 cm$ wide magnetic field at $t = 0$ . The value of induced emf in the loop at $t = 10 s$ will be :

JEE Main 2024 (Online) 9th April Evening Shift Physics - Electromagnetic Induction Question 4 English

zero

4.5 mV

0.3 mV

3 mV

Question 2.

In a coil, the current changes from $- 2 A$ to $+ 2 A$ in $0.2 s$ and induces an emf of $0.1 V$ . The self inductance of the coil is :

4 mH

2.5 mH

1 mH

5 mH

Question 3.

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:

JEE Main 2024 (Online) 5th April Morning Shift Physics - Electromagnetic Induction Question 3 English

\frac{μ_{o}}{2 π} \cdot \frac{b^{2}}{a}

\frac{μ_{o} π a^{2}}{2 b}

\frac{μ_{0} π b^{2}}{2 a}

\frac{μ_{0}}{2 π} \cdot \frac{a^{2}}{b}

Question 4.

A transformer has an efficiency of

80 %

and works at

10 V

and

4 kW

. If the secondary voltage is

240 V

, then the current in the secondary coil is :

1.33 A

13.33 A

1.59 A

15.1 A

Question 5.

A coil is places perpendicular to a magnetic field of $5000 T$ . When the field is changed to $3000 T$ in $2 s$ , an induced emf of $22 V$ is produced in the coil. If the diameter of the coil is $0.02 m$ , then the number of turns in the coil is:

140

Question 6.

Match List I with List II

	List I		List II
(A)	Gauss's law of magnetostatics	(I)	$\oint \vec{E} \cdot \vec{d} a = \frac{1}{ε_{0}} \int ρ d V$
(B)	Faraday's law of electro magnetic induction	(II)	$\oint \vec{B} \cdot \vec{d} a = 0$
(C)	Ampere's law	(III)	$\int \vec{E} \cdot \vec{d} l = \frac{- d}{d t} \int \vec{B} \cdot \vec{d} a$
(D)	Gauss's law of electrostatics	(IV)	$\oint \vec{B} \cdot \vec{d} l = μ_{0} I$

Choose the correct answer from the options given below:

A-III, B-IV, C-I, D-II

A-IV, B-II, C-III, D-I

A-II, B-III, C-IV, D-I

A-I, B-III, C-IV, D-II

Question 7.

Match List I with List II

	List - I		List - II
(A)	$\oint \vec{B} \cdot \vec{d l} = μ_{o} i_{c} + μ_{o} ε_{o} \frac{d ϕ_{E}}{d t}$	(I)	Gauss' law for electricity
(B)	$\oint \vec{E} \cdot \vec{d l} = \frac{d ϕ_{B}}{d t}$	(II)	Gauss' law for magnetism
(C)	$\oint \vec{E} \cdot \vec{d A} = \frac{Q}{ε_{o}}$	(III)	Faraday law
(D)	$\oint \vec{B} \cdot \vec{d A} = 0$	(IV)	Ampere - Maxwell law

Choose the correct answer from the options given below:

A-IV, B-III, C-I, D-II

A-I, B-II, C-III, D-IV

A-IV, B-I, C-III, D-II

A-II, B-III, C-I, D-IV

Question 8.

A rectangular loop of length $2.5 m$ and width $2 m$ is placed at $60^{\circ}$ to a magnetic field of $4 T$ . The loop is removed from the field in $10 \sec$ . The average emf induced in the loop during this time is

- 2 V

+ 2 V

+ 1 V

- 1 V

Question 9.

12 V

battery connected to a coil of resistance

6 Ω

through a switch, drives a constant current in the circuit. The switch is opened in

1 ms

. The emf induced across the coil is

20 V

. The inductance of the coil is :

5 mH

8 mH

10 mH

12 mH

Question 10.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$

Assertion A: A bar magnet dropped through a metallic cylindrical pipe takes more time to come down compared to a non-magnetic bar with same geometry and mass.

Reason R: For the magnetic bar, Eddy currents are produced in the metallic pipe which oppose the motion of the magnetic bar.

In the light of the above statements, choose the correct answer from the options given below

A is true but R is false

A is false but R is true

Both A and R are true but R is NOT the correct explanation of A

Both A and R are true and R is the correct explanation of A