In this post we are going to have a glance on the special apparatus called inductor.
An Inductor, also called a coil or reactor, is a passive two-terminal electrical component which resists changes in electric current passing through it. It consists of a conductor such as a wire, usually wound into a coil. Energy is stored in a magnetic field in the coil as long as current flows.

  

According to Lenz's law the direction of induced electromotive for (or "e.m.f.") is always such that it opposes the change in current that created it. As a result, inductors always oppose a change in current, in the same way that a flywheel opposes a change in rotational velocity. 

Care should be taken not to confuse this with the resistance provided by a resistor.

It is defined as the ratio of the voltage to the rate of change of current.Inductors have values that typically range from 1 µH (10⁻⁶H) to 1 H.

In further posts we are going to know the different typesand applications of an inductor.

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