E

Electronic:

The use of active electronic components (integrated circuits, transistors, valves etc) which require a power supply to function. Such "active" components will always be used in conjunction with passive components

Earth

also known as ground to prevent human from shocks

Eddy currents

Currents induced into a conducting core due to the varying magnetic field.

Efficiency

The amount of power given to the load of an amplifier as a % of the power wanted from the power supply.

Electric charge

Electric energy or Static charge stored on the surface of a material

Electric field

A field or force that exists in the space between two different potentials or voltages. Also called electrostatic field.

Electroluminescence

Conversion of electrical energy into light energy.

Electrolyte

Electrically conducting liquid (wet) or dry

Electrolytic capacitor

A capacitor having an electrolyte between the two plates..

Electromagnet

A coil of wire usually wound on a soft iron or steel core. When we pass current through the coil a magnetic field is generated.

Electromagnetic induction

Voltage generated in coil because of relative motion between the coil and magnetic lines of force.

Electromagnetic wave

Wave that consists of both electric and magnetic changes.

Electromagnetism

Refers to the magnetic field generated around a conductor when current is passed through it.

Electromotive force

Force that causes the motion of electrons due to potential difference between two points. Also called EMF

Electron

Smallest sub atomic particle of negative charge that orbits the nucleus of an atom.

Electron flow

Electrical current formed by the movement of free electrons towards a positive terminal.

Electrostatic

Related to static electric charge.

Electrostatic field

Force field generated by static electrical charges.

Emitter

The semiconductor region from which charge carriers are injected into the base of a bipolar junction transistor. Other regions are base and collector.

Energy

Capacity to do work.

Equivalent resistance

Total resistance of all the individual resistances in a circuit