what do you mean by average and the virtual value of A.C?  please tell me in the simple language .

Average Value - Average value is the value of voltage or current where the area of the wave above the value equals the area of the wave below the value.

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Peak Value - Peak Value is defined  as the highest or the lowest value of a certain (electrical) wave.

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Effective Value - An effective value is the value that DC would have to produce to have the same effect as an AC value.

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RMS Value -  RMS is the value that DC would have to produce to have the same effect as an AC value and is determined using the root mean square (RMS) formula. The effective value of AC.

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Root mean square value and virtual value of current are same. Root mean square current means the energy delivered by a current in one cycle.

RMS value of AC current gives a practical unit to measure the AC current and relate it in terms of energy delivered.

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