JEE Main 2022 · 24 Jun · Shift 2 · Physics Q40

PhysicsSingle correct+4 / -1Question 40 of 90

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.

Answer and worked solution

Official answer: C

Statement I is true: in a series LCR circuit at resonance $X_L=X_C$ and the net reactance is zero.

Statement II is false: for a purely inductive or purely capacitive circuit the phase difference is $90°$ and the average power is zero.

(C)

Topics:Power in AC circuits LCR circuits and resonance

JEE Main 2022 · 24 Jun · Shift 2, Physics question 40