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A series LCR circuit with L = 0.12 H, C ...

A series LCR circuit with `L = 0.12 H, C = 480 nF, R = 23 Omega` is connected to a 230 V variable frequency supply.
What is the source frequency for which average power absorbed by the circuit is maximum. Obtain the value of this maximum power.

Text Solution

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Inductance `L = 0.12 H`,
Capacitance `C = 480 nF = 480xx10^(-9)F`
Resistance `R = 23 Omega`
The rms value of voltage Vrms = 230 V
Average power is maximum for resonance.
`P_("av (max)")=I_("rms")^(2).R=10xx10xx23=2300W`.
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