1. Tardigrade
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  4. There is a current of 20 milliampere through an ideal choke coil of 1.5 H when connected to 220 volt, 50 hertz ac supply. The power consumed is :

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Q. There is a current of 20 milliampere through an ideal choke coil of 1.5 H when connected to 220 volt, 50 hertz ac supply. The power consumed is :

Electromagnetic Induction

Solution:

Ideal choke is a wattless device. The phase angle between the current and emf is $\frac{\pi}{2}$. This gives power factor cos $\phi = cos \frac{\pi}{2} = 0$