An AC source supplies a sinusoidal voltage with a peak value of $V_m=300,\text{V}$. What is its rms voltage?

Step-by-step solution

1. Recognise the relation for a sinusoidal wave: $V_{\text{rms}}=\frac{V_m}{\sqrt{2}}$.
2. Substitute $V_m=300,\text{V}$ into the formula.
3. Compute $V_{\text{rms}}=300/\sqrt{2}\approx 212.13,\text{V}$.
4. Round to the nearest whole number: $212,\text{V}$.

Concept tested: RMS voltage calculation

Published 9 September 2026 · Last updated 16 September 2026 · How this solution was prepared and checked