Q. The power factor of good choke coil is
A) Nearly zero
B) Exactly zero
C) Nearly one
D) Exactly one
Explanation
(a) $\cos\phi = \frac{R}{Z}.$ In choke coil $\phi = 90{^\circ}$ so $\cos\phi \approx 0$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.