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 $



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