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Power in an AC Circuit

An L-C-R se...

Question

An $L - C - R$ series circuit with $L = 0.120 H, R = 240 Ω$ , and $C = 7.30 μ F$ carries an rms current of $0.450 A$ with a frequency of $400 H z$ . What average power is delivered by the source? (rounded off to the nearest integer)

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Solution

$P = I_{r m s}^{2} R$
$= (0.45)^{2} (240)$
$= 48.6 W$

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