Voltage and current in an a.c. circuit are given by V=5 sin `(100pit-pi/6)` and I=4 sin `(100pit+pi/6)` then …………..

Options

A. voltage leads the current `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

Phase difference between V and I is `delta=delta_2-delta_1`
`=pi/6-(-pi/6)`
`=pi/3 = 60^@`