Assertion : Average value of ac over a complete cycle is always z… - Vidyadip

Question

Assertion : Average value of ac over a complete cycle is always zero.
Reason : Average value of ac is always defined over half cycle.

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Answer

(b) The mean average value of alternating current (or emf) during a half, cycle is given by $I_m=0.636 I_0$ (or $E_m=0.636 E_0$ )During the next half cycle, the mean value of ac will be equal in magnitude but opposite in direction.For this reason the average value of ac over a complete cycle is always zero. So the average value is always defined over a half cycle of ac.

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