Question Detail
Question
An inductor, L = 0.5H, in series with a resistor, R = 250 Ohm, are connected to an a.c. source 100v, 50Hz. Determine the power factor of the circuit.
Correct Answer
Option B is the correct answer.
Detailed Explanation
XL=157.1. Z=sqrt(250^2+157.1^2)=295.2. PF=R/Z=0.85.
Hint
XL=157.1.