why no current flows through the inductor as soon as switch is turned on in the circuit
When a switch is initially turned on in an electrical circuit containing an inductor, there is a brief moment when no current flows through the inductor. This is due to the inductor's property of opposing changes in current.
When the switch is closed, the voltage across the inductor suddenly changes from zero (when the switch was open) to a non-zero value (typically the source voltage). The inductor reacts to this change in voltage by trying to resist the change. As a result, it temporarily prevents the flow of current.
However, this initial resistance to the change in current is short-lived. Once the inductor's magnetic field is established (which occurs almost instantaneously), it no longer opposes the flow of current, and current begins to flow through the circuit as usual.
So, to sum it up:
- When the switch is initially turned on, there is a brief moment when no current flows through the inductor.
- After this initial moment, current flows through the inductor without any further opposition.
This behavior is described by Faraday's law of electromagnetic induction and is a fundamental property of inductors in electrical circuits.