A) AC circuit only
B) DC circuit only
C) AC and DC circuit
D) neither AC nor DC circuit
Correct Answer: A
Solution :
In a direct circuit, the current is reduced by means of a rheostat. This results in a loss of electrostatic energy per second as heat. The current in an alternating current circuit may however, be reduced by means of a device which involves little loss of energy. This device is called a choke coil.
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