A sinusoidal voltage v = 50sin t is applied to a series RL circuit. The current in the circuit is given by I = 25sin ( t-53 ). Find the power factor.

A sinusoidal voltage v = 50sin t is applied to a series RL circuit. Th

1.	A sinusoidal voltage v = 50sin t is applied to a series RL circuit. The current in the circuit is given by I = 25sin ( t-53 ). Find the power factor.
A.	0.4
B.	0.5
C.	0.6
D.	0.7
Answer» D. 0.7