JEE Main 2024 (Online) 31st January Morning Shift | Electromagnetic Induction Question 9 | Physics

1

JEE Main 2024 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

+4

-1

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 $$0.02 \mathrm{~m}$$, then the number of turns in the coil is:

A

35

B

70

C

7

D

140

2

JEE Main 2024 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	List I		List II
(A)	Gauss's law of magnetostatics	(I)	$$\oint \vec{E} \cdot \vec{d} a=\frac{1}{\varepsilon_0} \int \rho d V$$
(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)	$$\oint \vec{B} \cdot \vec{d} l=\mu_0 I$$

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

3

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

4

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

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