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(A) choke coil is an inductor with high inductance and negligible resistance. It is used to control current in $AC$ circuits.In an $AC$ circuit,the in

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$AC$

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(A) choke coil is an inductor with high inductance and negligible resistance. It is used to control current in $AC$ circuits.In an $AC$ circuit,the inductive reactance is given by $X_L = \omega L = 2\pi f L$. Since $f > 0$,the choke coil offers significant impedance to the current.In a $DC$ circuit,the frequency $f = 0$,so the inductive reactance $X_L = 0$. The coil acts as a simple wire with negligible resistance,failing to control the current effectively.

$A$ choke coil is used to control:

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