A) \[\frac{1}{2}L{{I}^{2}}\]
B) \[2L{{I}^{2}}\]
C) \[\frac{1}{4}L{{I}^{2}}\]
D) \[\text{Zero}\]
Correct Answer: D
Solution :
The average of instantaneous power in an AC circuit over a full cycle is called average power. Its unit is watt. \[{{P}_{av}}={{V}_{rms}}{{I}_{rms}}\cos \phi \] In a pure inductance, phase difference between voltage and current \[\phi =90{}^\circ \]. Power factor \[\cos \phi =0\] \[\therefore \] Power \[P=0\]
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