Question

Statement I: In a series $L C R$ circuit at resonance condition, power consumed by the circuit is maximum.
Statement II: At resonance condition, effective resistance of circuit is maximum.

• A. If both statements are true and statement II is the correct explanation of statement $I$.
• B. If both statements are true but statement II is not the correct explanation of statement $I$.
• C. If statement $I$ is true but statement II is false.
• D. If both statements are false.

Answer 1

Answer: (C)

$P_{ av }=\frac{V I \cos \phi}{2}$
At resonance condition, $\cos \phi=1$
But $Z=R$
Which is minimum.