Average value of alternating emf.
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he mean value or average value of AC over a complete cycle is zero. So we do not consider the average value of AC over one cycle. We therefore take the average value of AC over a half cycle only I.e. from t=0 to t=T/2
The average value of AC over a half cycle is that value of steady current that would send same amount of charge in same interval of time that would be sent by the DC in same time.
To calculate the mean value of ac, Let us consider an ac given by
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