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Calculate the active power in .an 18.064 H inductor.

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Calculate the active power in .an 18.064 H inductor.

(a) 4.48 W

(b) 17.89 W

(c) 0 W

(d) 25.45 W

This question was addressed to me in homework.

The doubt is from Induction Motors in division Speed Control of Direct Current Motors & Induction Motors of Electric Drives

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The correct option is (c) 0 W

For explanation: The inductor is a linear element. It only absorbs reactive power and stores it in the form of oscillating energy. The voltage and current are 90° in phase in case of the inductor so the angle between V & I is 90°. P = VIcos90 = 0 W.

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