Question

An a.c. Voltage is applied to a resistance `R=30 Omega` and an inductor L in series. If the inductive reactance is also `30 Omega`, the phase difference between the applied voltage and the current in the circuit is
A. `(pi)/6`
B. `(pi)/2`
C. `(pi)/3`
D. `(pi)/4`

Answer 1

Correct Answer - D
Phase difference between E and I in an L-R circuit is
`tan phi = (X_L)/R = 30/30 =1`
`:. Phi = 45^(@) = (pi)/4`.