Electro Magnetic Induction And Alternating Currents Question 1

Question: Choke coil is used to control [CPMT 1984]

Options:

A) ac

B) dc

C) Both ac and dc

D) Neither ac nor dc

Show Answer

Answer:

Correct Answer: A

Solution:

The choke coil can be used only in ac circuits, not in dc circuits, because for dc (w = 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.



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