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  4. The power factor of a good choke coil is

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Q. The power factor of a good choke coil is

Rajasthan PMTRajasthan PMT 2009Alternating Current

Solution:

For a good choke coil inductance is very high and resistance is very low. Therefore, power factor $ =\cos \phi =\cos {{90}^{o}}=0 $ Therefore, power factor for a good choke coil is nearly zero.