An alternating e.m.f. is applied to purely capacitive circuit. The phase relation between e.m.f. and current flowing in the circuit is or in a circuit containing capacitance only

Options

A. e.m.f. is ahead of current by `pi//2`
B. Current ahead of e.m.f by `pi//2`
C. Current lags behind e.m.f. by `pi`
D. Current is ahead of e.m.f. by `pi`

Answer

B

Explanation

For purely capacitive circuit `e=e_(0) sin omegat`
`i=i_(0)sin (omegat+(pi)/2)` i.e., current is ahead of emf by `pi//2`