Question

In an LCR circuit at resonance, the a.c. source current is
A) maximum in a series LCR circuit only.
B) maximum in a parallel LCR circuit only.
C) maximum in both series and parallel LCR circuits.
D) minimum in both series and parallel LCR circuits.
The correct answer is

• A. B
• B. D
• C. C
• D. A

Hint:

At resonance the series circuit has minimum impedance (maximum current) while the parallel circuit has maximum impedance (minimum current).

Answer 1

The Correct Option is D

Step 1: Contrast:
Series resonance accepts current easily (low impedance). Parallel resonance blocks current from the source (high impedance, a rejector circuit).

Step 2: Conclusion:
Only the series circuit has maximum source current at resonance, which is statement (A).

Step 3: Answer:
Option D.

Final Answer:
Option D (statement A). \[ \boxed{\text{(D) statement (A)}} \]