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A circuit containing a 80 mH inductor and a 60 μF capacitor in series is connected to a 230 V ,50 Hz supply.

Q7.18 (c)  A circuit containing a 80mH inductor and a 60\mu F  capacitor in series is connected to a 230\: V50\: Hz  supply. The resistance of the circuit is negligible

(c) What is the average power transferred to the inductor?

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Since

 I=I_{max}sin(wt-\phi )

Current flowing in the circuit is sinusoidal and hence average power will be zero as the average of sin function is zero.in other words, the inductor will store energy in the positive half cycle of the sin (0 degrees to 180 degrees) and will release that energy in the negative half cycle(180 degrees to 360 degrees), and hence average power is zero.

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