Electrons & Electricity

What is electricity?

Everything in the world is made up from molecules which contain atoms.  Atoms contain a nucleus in the centre made up from protons and neutrons. 

Protons have a positive charge.  In orbit around the nucleus are electrons.  These have a negative charge.  In materials that conduct electricity (e.g. copper) some of the outer electrons move freely when electrical pressure is applied.  This pressure, measured in Volts, results in the electrons to move in a single direction to produce a current.

Electric current is the rate of movement of electrons and is measured in Amps.  Free flowing electrons require a paths or circuit in order to move.  This path is provided by materials classified as conductors.   Electrons do not move through an insulating material.

14 April, 2000