Q. A circuit has a resistance of $12\ \Omega$ and an impedance of $15\ \Omega$. The power factor of the circuit will be
A) 0.8
B) 0.4
C) 1.25
D) 0.125
Explanation
(a) Power factor$= \cos{\phi = \frac{R}{Z}}$
$= \frac{12}{15} = \frac{4}{5} = 0.8$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.