Question

Voltage and current in an ac circuit are given by V = 5 sin(100 π t - π/6) and i = 4 sin(100 π t + π/6)

(a) Voltage leads the current by 30° 

(b) Current leads the voltage by 30° 

(c) Current leads the voltage by 60° 

(d) Voltage leads the current by 60°

Answer 1

The correct option is (c) Current leads the voltage by 60°.

Explanation:

Phase difference relative to current

i.e. voltage lag behind the current by 60^o or current leads the voltage by 60^o.