The RMS value of voltage (Vrms) in a purely resistive AC circuit is related to peak voltage (Vm) by ______. 

1
\(\rm V_{rrms}=\frac{\sqrt2}{V_m}\)
2
Vrms = √2 Vm
3
\(\rm V_{rrms}=\frac{V_m}{\sqrt2}\)
4
Vrms = Vm

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