Question

$120\, AC$ voltage is applied to $10$ ohm resistance. The peak voltage across the resistor is

• A. $120 \,V$
• B. $120 \sqrt{2} V$
• C. $\frac{120}{\sqrt{2}}V$
• D. none of these

Answer 1

Answer: (B)

$120 \sqrt{2} V$

Answer 2

Here, $V_{rms}=120\,AC$ Peak voltage $V_{0}=V_{rms} \sqrt{2}$ $=120 \sqrt{2}\,V$