Question

Why Inductor behave as a short circuit?

Answer 1

Hint: In the case of a problem based on the electricity branch of physics, we know that all the parameters vary with each other (directly or indirectly) in any way hence, analyze every aspect of the solution i.e., current, voltage, resistance, inductance, etc., needed for the question with the scientific approach. Then, present the answer with a proper explanation.

Complete step by step solution:
As we all know it is a nature of an inductor to oppose any change in current. It means whenever there is a change in current, an inductor will oppose it and this results in an emf induced in an inductor itself which is known as self-induced emf.

Also, we know when a DC source is applied in a circuit, there will not be any change in current. Therefore, an inductor does not offer any opposition. As there is no rate of change of current in a circuit with respect to time, zero voltage will be induced in the inductor. Thus, When DC supply is used, the induced voltage across the inductor will become zero which is referred to as the short circuit effect.

Hence, in short, we can say that the “Inductor behaves as a short circuit when DC supply is used” due to no change in current and zero voltage induced.

Note:Since this is a theoretical-based problem hence, it is essential that the given question is to be analyzed very carefully to give a precise explanation. While writing an explanation always remember the basic fundamentals of an inductor and its properties to provide the exact reasons in support of your explanation.