Practice portal › Alternating Current › Alternating Quantities: RMS and Mean
Asked in NEET 2011 Mains · RMS and mean values
Square the waveform first. V² is V₀² for half of each period and 0 for the other
half.
The mean of V² is therefore (V₀²)/2.
Taking the square root, Vᵣₘₛ=(V₀)/(√2).
Note that the answer coincides with the sinusoidal result, but for a quite different reason: here
it comes from the waveform being at full height half the time, not from averaging sin².
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