In an ac circuit, the current lags behind the voltage by `pi//3`. The components in the circuit are

Options

A. R and L
B. L and C
C. R and C
D. Only R

Answer

A

Explanation

Since, current lags behind the voltage in phase by a constant angle, then circuit must contain R and L

We find that in RL circuit, voltage leads the current by a phase angle `phi`, where
`tanphi=(AK)/(OA)=(OL)/(OA)=(V_(L))/(V_(R))=(I_(0)X_(L))/(I_(0)R)`
`tan phi=(X_(L))/(R)`