In an AC circuit, if the peak voltage is 20 V, then root mean square (rms) voltage will be
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 14.14 V
For a sinusoidal ac, the rms value is the peak value divided by \( \sqrt{2} \).
\( \displaystyle V_{\mathrm{rms}} = \frac{V_{0}}{\sqrt{2}} = \frac{20}{1.414} = 14.14\,\mathrm{V} \)