A conductor is a material that allows electric charge to move through it as an electric current.

Usually the charge is carried by electrons,and the conducter is a metal. Metals make good conducters because the outer electrons of there atoms are loosely attached ,and the eletrons

can drift through the metal when a voltage is applied. some materials have all their electrons firmly fixed in place,so they do not conduct electricity well. A material like this is called an INSULTER.

INSULTORS

INSULTORS CONDUCT electricity poorly or not at all. their electrons are bound tightly and will only move if an extremely high voltage is applied. insulters are essential in electrical engineering,stopping current flowing where it should not. Most common mateials,expect metal,are insultors,but not all are suitable for electrical engineering. The earliest practical insultors were air,pottery,glass and rubber. all are still used,but most insultors today are plastics.