Given below are two statements: Statement I: An AC circuit undergoes… | JEE Main 2023 (13 Apr, Shift 2)

Q59JEE Main 2023 · 13 APR · SHIFT 2Easy

Resonance, Bandwidth & Q Factor

Given below are two statements:

Statement I: An AC circuit undergoes electrical resonance if it contains either a capacitor or an inductor.

Statement II: An AC circuit containing a pure capacitor or a pure inductor consumes high power due to its non-zero power factor.

In the light of above statements, choose the correct answer form the options given below:

Show answer and solution

Answer: (a)

Statement I: resonance needs both $L$ and $C$ so that $X_L = X_C$ ; one of them alone cannot resonate. False.
Statement II: for pure $L$ or pure $C$ , $\phi = 90^\circ$ , power factor $\cos\phi = 0$ , so average power is zero. False.
So the answer is (a) both statements are false.

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