Topic: Inductance

Message

Inductance

Inductance is the property in an electrical circuit where a change in the electric current through that circuit induces an electromotive force (EMF) that opposes the change in current (See Induced EMF).

In electrical circuits, any electric current i produces a magnetic field and hence generates a total magnetic flux Φ acting on the circuit. This magnetic flux, due to Lenz's law, tends to act to oppose changes in the flux by generating a voltage (a back EMF) in the circuit that counters or tends to reduce the rate of change in the current. The ratio of the magnetic flux to the current is called the self-inductance, which is usually simply referred to as the inductance of the circuit. To add inductance to a circuit, electronic components called inductors are used, which consist of coils of wire to concentrate the magnetic field.

The term 'inductance' was coined by Oliver Heaviside in February 1886. It is customary to use the symbol L for inductance, possibly in honour of the physicist Heinrich Lenz.

The unit of inductance is the henry (H): , named after American scientist and magnetic researcher Joseph Henry. 1 H = 1 Wb/A

Edited by divyalaks - 07Dec2009 at 11:55pm

Author	Message
divyalaks Senior Member Joined: 22Jun2009 Online Status: Offline Posts: 630	Topic: Inductance Posted: 07Dec2009 at 11:53pm
	Inductance Inductance is the property in an electrical circuit where a change in the electric current through that circuit induces an electromotive force (EMF) that opposes the change in current (See Induced EMF). In electrical circuits, any electric current i produces a magnetic field and hence generates a total magnetic flux Φ acting on the circuit. This magnetic flux, due to Lenz's law, tends to act to oppose changes in the flux by generating a voltage (a back EMF) in the circuit that counters or tends to reduce the rate of change in the current. The ratio of the magnetic flux to the current is called the self-inductance, which is usually simply referred to as the inductance of the circuit. To add inductance to a circuit, electronic components called inductors are used, which consist of coils of wire to concentrate the magnetic field. The term 'inductance' was coined by Oliver Heaviside in February 1886. It is customary to use the symbol L for inductance, possibly in honour of the physicist Heinrich Lenz. The unit of inductance is the henry (H): , named after American scientist and magnetic researcher Joseph Henry. 1 H = 1 Wb/A Edited by divyalaks - 07Dec2009 at 11:55pm
	Launch your own Website with FREE Domain Name, Click Here Post Resume: Click here to Upload your Resume & Apply for Jobs

	IP Logged


One Stop GATE Forum : GATE Technical Discussions, Doubts & Queries : GATE in Electrical Engineering (EE)