Question

A coil having an inductance of `1//pi` henry is connected in series with a resistance of `300 Omega`. If 20 volt from a 200 cycle source are impressed across the combination, the value of the phase angle between the voltage and the current is :
A. 5/4.
B. 4/5.
C. 3/4.
D. 4/3.

Answer 1

Correct Answer - D
tan`phi` = `underset(L)(X)`/R ( In case of L-R circuit)
L`omega`/R = L`2pi`f/R = `2 xx 200 / 300 ` = 4/3