The working (operation) of a choke coil is based primarily on:

Self-induction
Mutual inductance
Eddy currents
None of the above

Correct answer: Self-induction

Solution

A choke coil is essentially an inductor that opposes changes in current through the back-EMF it generates due to its own changing flux. This phenomenon is self-induction. It provides inductive reactance to limit AC current with negligible power dissipation, unlike a resistor.

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