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  4. If wattless current flows in the AC circuit, then the circuit is

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Q. If wattless current flows in the $AC$ circuit, then the circuit is

JEE MainJEE Main 2022Alternating Current

Solution:

Purely Inductive circuit
$\theta=\frac{\pi}{2} $
$\cos \frac{\pi}{2}=0$
Average power $=0$