Question

Choke coil is used to control

• A. ac
• B. dc
• C. Both ac and dc
• D. Neither ac nor dc

Answer 1

Answer: (A)

ac

Answer 2

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