Choke coil is used to control

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Both ac and dc

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Neither ac nor dc

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Solution

The correct option is A ac
The choke coil can be used only in ac circuits, not in dc circuits, because for $d c (ω = 0)$ the inductive reactance $X_{L} = ω L$ of the coil is zero, only the resistance of the coil remains effective which too is almost zero.

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