Question

Define terms a) peak value of alternating current b) mean value of alternating current and c) r.m.s value of alternating current.

Answer 1

(a) $\underset{–}{Peakvalueofac}$(or )

It is the maximum value attained by an alternating current during a cycle.

(b) $\underset{–}{Meanoraveragevalueofac}$(or )

It is the average of the instantaneous values of an alternating current (or voltage) measured over half a cycle.

(c)$\underset{–}{\text{Root mean square value of ac}}$( )

It is the square root of the mean of squares of instantaneous values of ac during one complete cycle.