JEE Main 2022 (Online) 25th June Morning Shift | Alternating Current and Electromagnetic Induction Question 77 | Physics

JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

Match List-I with List-II.

	List - I		List -II
(A)	AC generator	(I)	Detects the presence of current in the circuit
(B)	Galvanometer	(II)	Converts mechanical energy into electrical energy
(C)	Transformer	(III)	Works on the principle of resonance in AC circuit
(D)	Metal detector	(IV)	Changes an alternating voltage for smaller or greater value

Choose the correct answer from the options given below :

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

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

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

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

JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

If wattless current flows in the AC circuit, then the circuit is :

Purely Resistive circuit

Purely Inductive circuit

LCR series circuit

RC series circuit only

JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

The electric field in an electromagnetic wave is given by E = 56.5 sin $$\omega$$(t $$-$$ x/c) NC^$$-$$1. Find the intensity of the wave if it is propagating along x-axis in the free space.

(Given : $$\varepsilon $$₀ = 8.85 $$\times$$ 10^$$-$$12C²N^$$-$$1m^$$-$$2)

5.65 Wm^$$-$$2

4.24 Wm^$$-$$2

1.9 $$\times$$ 10^$$-$$7 Wm^$$-$$2

56.5 Wm^$$-$$2

JEE Main 2022 (Online) 24th June Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : The reactance of an ac circuit is zero. It is possible that the circuit contains a capacitor and an inductor.

Statement II : In ac circuit, the average power delivered by the source never becomes zero.

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