Alternating Current

Mean Value of Voltage and Current :

The mean value of sinusoidal current or voltage in one complete cycle is zero, for half cycle, the mean value can be found as given below.

I = I0 sin ωt

Similarly vmean = 2Vo

Root Mean square value of voltage & current :

(Vrms and Irms)

I = I0 sin ωt


Similarly vrms = Vo/√2

Exercise 1: The peak value of an alternating current is 10 A. Find its rms value.

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