Question

A coil of resistance `300 Omega` and inductance 1.0 henry is connected across an voltages source of frequency `300//2pi Hz`. The phase difference between the voltage and current in the circuit is
A. `(pi)/(2)`
B. `(pi)/(4)`
C. `(pi)/(3)`
D. `(pi)/(6)`

Answer 1

Correct Answer - B
`X_(L) = 2 pi fL = 2pi xx (300)/(2 pi) xx 1 = 300 Omega , R = 300 Omega`
`tan phi = (X_(L))/(R ) = 1 implies phi = (pi)/(4)` (lagging)