NEET Physics AC Voltage MCQ Question
In a series LCR circuit with L = 0.12 H, C = 480 nF, and R = 23 Ω connected to a 230 V variable frequency supply, what is the source frequency for which current amplitude is maximum?
650 Hz
700 Hz
750 Hz
800 Hz
Correct Answer
Detailed Explanation
The current amplitude is maximum at the resonant frequency, which is given by f = 1/(2π√(LC)). Substituting L = 0.12 H and C = 480 nF, we calculate f ≈ 650 Hz.
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