Resonance, Bandwidth & Q Factor
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
Show answer and solution
Answer: (d)
- Series resonance: is minimum, so source current is maximum.
- Parallel (anti-)resonance: impedance is maximum, so source current is minimum.
- So only statement A is correct; the answer is (d) A.