Question

Choose the correct statement.
(a) A capacitor can conduct a dc circuit but not an inductor.
(b) In a de circuit the inductor can conduct but not a capacitor.
(c) In de circuit both the inductor and capacitor cannot conduct.
(d) The inductor has infinite resistance in a dc circuit.​

Answer 1

option d is the right ans.

Answer 2

The correct answer to the above question is (d), that is the inductor has infinite resistance in a dc circuit.

• The inductance of the inductor will be infinite resistance in a dc circuit.

• The capacitor cannot conduct the current in a dc circuit, because in a dc circuit it is regarded as an open connection of infinite resistance, therefore the current cannot be conducted in a dc circuit.

• Inductor and capacitor can only conduct current when it is connected to ac circuit. In a dc circuit, they will possess infinite resistance.

• At t=0, the inductor current (I) is zero. At t=1 second, the current must also be zero since the current through an inductor cannot change. Since the voltage across the inductor (V) at t= 1 second is non-zero, the effective “resistance” of the inductor at t=1 is V/I = V/0 = infinite.