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. When a current flows through it, energy is stored temporarily in a magnetic field in the coil.

HOW INDUCTOR WORKS:
•The number of coils – More coils means more inductance.
•The material that the coils are wrapped around (the core)
•The cross-sectional area of the coil – More area means more inductance.
•The length of the coil – A short coil means narrower (or overlapping) coils, which means more inductance.

Putting iron in the core of an inductor gives it much more inductance than air or any non-magnetic core would. The standard unit of inductance is the henry. In a capacitor, the formula is expressed as “the current in a circuit is in proportion to the time rate of change of the voltage across it.

i=c(dv/dt)

In series and parallel capacitors, they are combined in the same way as conductances. An inductor formula states that the voltage across it is directly equitable to the rate of change of the current through the circuit.

The formula is written like this:

v = L(di/dt)