Inductor, inductance

1.  Inductor: An Inductor is a passive element Which use to store an electric charges flows through it in the form of magnetic field. An Inductor is also called as a Coil or reactor.A basic form of inductor simply made of turning a wire in circular motion.

2. Inductance: It is the property of substance which opposes the electric charges flowing through it . It's a ability of inductor. When a current flows through the inductor, energy gets stored in a magnetic field in the coil . It is indicated by "L" and Its unit is Henry's.

3.Roles of inductance in a circuits

i. Inductors are used to block AC while allowing DC to pass ; inductors are designed for this purpose are called chokes.They are also used in electronics filter to separate signal's of different frequencies, and in combination with Capacitors to make tunned circuit,used to tune radio and TV receivers .

ii. Inductors are used as a energy storage device in many switched-mode power supplies to produce DC current.The inductor supplies energy to the circuit to keep current flowing during the "off" switching periods.

iii. Inductors are employed in an electrical power systems, where there are use to limit switching currents and fault currents . In this field,they are more commonly referred to as reactors (or series reactors)

iv. Inductors are also used in power systems as reactive compensators to limit Voltage in the system in case of no-load or light load in the transmission lines . These compensators,which are connected in parallel,are usually called shunt reactors.