In an LCR circuit let , , , and . We have to calculate average power dissipated assuming (a) that the inductor is removed from the circuit and (b) that the capacitor is removed.

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The inductive load

The capacitive load

The rms-emf will be

(a)

When the inductor is removed from the circuit the impedance will be

The rms-current will be

Therefore, the average power dissipated will be

(b)

When the capacitor is removed from the circuit the impedance will be

The rms-current will be

Therefore, the average power dissipated will be