Question

In an AC circuit, peak value of voltage is $423$ volts. Its effective voltage is

• A. 400 volts
• B. 323 volts
• C. 300 volts
• D. 340 volts

Answer 1

Answer: (C)

Effective voltage, $V_{\text{r.m.s. }}=\frac{V_o}{\sqrt{2}}$
$=\frac{423}{\sqrt{2}}=300V$