JEE Main 2022 (Online) 25th June Morning Shift | Alternating Current Question 79 | Physics

	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) 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.

Both Statement I and Statement II are true.

Both Statement I and Statement II are false.

Statement I is true but Statement II is false.

Statement I is false but Statement II is true.

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

-1

A resistance of 40 $$\Omega$$ is connected to a source of alternating current rated 220 V, 50 Hz. Find the time taken by the current to change from its maximum value to the rms value :

2.5 ms

1.25 ms

2.5 s

0.25 s

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