alleryStart learning →In the quantities rms current and rms voltage, what does rms stand for?
ARated maximum swing
BRoot mean square
CReal mean sinusoid
DRectified mean signal
Answer & Solution
Correct answer: B. Root mean square
1. To form the quantity, the waveform is first squared.
2. The mean of those squared values is then taken over a full cycle.
3. Finally the square root is taken, which is why the name reads root mean square.
4. The name describes the arithmetic recipe, not the shape of the waveform.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Alternating Current_
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