Question

The peak value of 220 volts of a.c mains is:

• A. $155.6$
• B. $220V$
• C. $311V$
• D. $440V$

Answer 1

Answer: (C)

As we know
$V_{rms}=\frac{V_0}{\sqrt{2}}$
(Peak) $V_0=\sqrt{2}\times V_{rms}$
$=1.41\times 220$
$V_0=311$ volts