Electromagnetic induction definitions

Electromagnetic induction idea

a changing electric field produces a magnetic field at right angles to the electric field

Sts electromagnetic induction

Electrical generator (power stations, alternators in cars and dynamos on bikes)

Magnetic flux

the number of magnetic field lines that pass through a certain area A whose surface is perpendicular to the field lines

Magnetic Field Strength

The number of flux lines per unit cross-sectional area

Electromagnetic induction

the production of an electromotive force (EMF) in a circuit when the magnetic flux linking the circuit changes

Faraday's law of electromagnetic induction

The induced e.m.f is directly proportional to the rate of change of magnetic flux link

Lenz's Law

The emf induced in a circuit acts in such a way to oppose the change producing it

Mutual induction

Any arrangement of 2 coils such that a current is induced in one when the current is changed in the other is said to possess mutual inductance

Self induction

The production of a back EMF in a coil whenever the current in that coil changes

Sts inductors

Dimmer switches stage lighting, tuning circuits radios, smoothing variations in DC

Transformer

A device that increases or decreases the voltage of alternating current