JEE Main 2024 (Online) 29th January Morning Shift | Electromagnetic Induction Question 14 | Physics

1

JEE Main 2024 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	List - I		List - II
(A)	$$\oint \vec{B} \cdot \overrightarrow{d l}=\mu_o i_c+\mu_o \varepsilon_o \frac{d \phi_E}{d t}$$	(I)	Gauss' law for electricity
(B)	$$\oint \vec{E} \cdot \overrightarrow{d l}=\frac{d \phi_B}{d t}$$	(II)	Gauss' law for magnetism
(C)	$$\oint \vec{E} \cdot \overrightarrow{d A}=\frac{Q}{\varepsilon_o}$$	(III)	Faraday law
(D)	$$\oint \vec{B} \cdot \overrightarrow{d A}=0$$	(IV)	Ampere - Maxwell law

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

2

JEE Main 2024 (Online) 27th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

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 loop during this time is

A

$$-2 \mathrm{~V}$$

B

$$+2 \mathrm{~V}$$

C

$$+1 \mathrm{~V}$$

D

$$-1 \mathrm{~V}$$

3

JEE Main 2023 (Online) 15th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

$12 \mathrm{~V}$ battery connected to a coil of resistance $6 \Omega$ through a switch, drives a constant current in the circuit. The switch is opened in $1 \mathrm{~ms}$. The emf induced across the coil is $20 \mathrm{~V}$. The inductance of the coil is :

A

$5 ~ \mathrm{mH}$

B

$8 ~\mathrm{mH}$

C

$10~ \mathrm{mH}$

D

$12 ~\mathrm{mH}$

4

JEE Main 2023 (Online) 11th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

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

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

A is true but R is false

B

A is false but R is true

C

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

D

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