An AC voltage source produces a sinusoidal voltage with peak value $V_m=120$ V. What is the RMS value of the voltage?

Step-by-step solution

1. The RMS value of a sinusoidal voltage is the peak value divided by $\sqrt{2}$.
2. Compute $V_{\text{rms}}=\frac{V_m}{\sqrt{2}}=\frac{120}{1.414}=84.85$ V.

Concept tested: RMS voltage calculation

Published 5 September 2026 · Last updated 16 September 2026 · How this solution was prepared and checked