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An inductor-coil having some resistance ...

An inductor-coil having some resistance is connected to an AC source. Which of the following quantities have zero average value over a cycle?

A

Induced emf in the inductor

B

Current

C

joules heat

D

Magnetic energy stored in inductor

Text Solution

Verified by Experts

The correct Answer is:
A, B
(a,b) : Joules heat and magnetic energy stored in inductor both are proportional to the square of the current and hence average cannot be zero . Current and induced emf in the inductor both change sinusoidal and hence average will be zero for one complete cycle.
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