A series circuit has

PHYSICS · Subjective · CBSE · Physics · Alternating Current · Alternating Current

Problem

A series LCR\text{LCR} circuit has R=30 ΩR = 30\,\Omega, L=0.15 HL = 0.15\,\text{H} and C=60 μFC = 60\,\mu\text{F}. (i) Determine the resonant frequency frf_r (nearest hertz). (ii) The circuit is now operated at a frequency higher than frf_r such that the power factor is 0.50.5 lagging. Calculate this operating frequency (nearest hertz). Take π2≈10\pi^2 \approx 10.

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