Q. 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 $volts$
Explanation
(c) Effective voltage $V_{r.m.s.} = \frac{V_{0}}{\sqrt{2}} = \frac{423}{\sqrt{2}} = 300\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.