Q. Voltage and current in an ac circuit are given by $V = 5\sin\left( 100\pi t - \frac{\pi}{6} \right)\ $ and $I = 4\sin\left( 100\ \pi t + \frac{\pi}{6} \right)$

A) Voltage leads the current by $30{^\circ}$
B) Current leads the voltage by $30{^\circ}$
C) Current leads the voltage by $60{^\circ}$
D) Voltage leads the current by $60{^\circ}$
Explanation

(c) Phase difference $\mathrm{\Delta}\phi = \phi_{2} - \phi_{1} = \frac{\pi}{6} - \left( \frac{- \pi}{6} \right) = \frac{\pi}{3}$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.