Electro Magnetic Induction And Alternating Currents Question 25
Question: The power factor of a good choke coil is [MP PMT 1994]
Options:
A) Nearly zero
B) Exactly zero
C) Nearly one
D) Exactly one
Show Answer
Answer:
Correct Answer: A
Solution:
$ \cos \varphi =\frac{R}{Z} $ . In choke coil $ \varphi \approx 90{}^\circ $ so $ \cos \varphi \approx 0 $
