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Physics
Physics
Problem
For a sinusoidal alternating voltage with peak value
V
m
V_{m}
V
m
, which one of the following gives its root-mean-square (rms) value
V
rms
V_{\text{rms}}
V
rms
? a)
2
V
m
π
\dfrac{2V_{m}}{\pi}
π
2
V
m
b)
V
m
2
\dfrac{V_{m}}{2}
2
V
m
c)
V
m
2
\dfrac{V_{m}}{\sqrt2}
2
V
m
d)
V
m
2
V_{m}\sqrt2
V
m
2
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