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

Options

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

C

Explanation

Current lead by voltage
Phase difference `(Delta phi) = (pi)/(6) - (- (pi)/(6)) = ( 2 pi)/( 6) = (pi)/(3) = 60^(@)`