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.
BETA
