A) nearly zero
B) exactly zero
C) nearly one
D) exactly one
Correct Answer: A
Solution :
Power factor of choke coil is \[\cos \phi =\frac{R}{Z}\] for choke coil, \[R=0\] \[\therefore \] \[\cos \phi \] should be zero. But, in actual practice, value of R is not zero, but it is very less. So, value of \[\cos \phi \] is approximately zero.
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