An inductor is a passive electronic component that stores energy in the form of a magnetic field. It consists of a coil of wire which creates a magnetic field when current passes through it.
When an electric current flows through an inductor, it induces a magnetic field around the coil. The direction of the magnetic field depends on the direction of the current flow. This magnetic field then stores the energy and creates a back EMF (electromotive force) opposing any changes in the current flow.
The unit of current in an inductor is amperes (A). This is the same unit for current in any electrical circuit.
The relationship between current and voltage in an inductor is described by Ohm's Law, which states that the voltage across an inductor is equal to the inductance of the inductor multiplied by the rate of change of current through it. This is known as the inductor's reactance, and is measured in ohms.
The current in an inductor is affected by several factors, including the inductance of the inductor, the frequency of the current passing through it, and the resistance in the circuit. Additionally, the physical properties of the inductor, such as the number of turns in the coil, also play a role in determining the current flow.