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Characteristics of Ohmic and non-Ohmic Conductors Some atoms contain loosely attached electrons. These electrons can be made to move easily from one atom to another. When these electrons move freely along a path, a current of electricity is created. Electrons can only flow freely in materials that conduct electricity. A Conductor of electricity is a substance that allows electricity to flow through it. Substances that do not conduct electricity are knows as Insulators. All metals are good conductors because inside them they have a large number of free electrons that can move easily from atom to atom. Insulators do not have free electrons inside them. Current is the flow of free electrons through a conductor in one particular direction. Current is also calculated by the amount of charges transferred per second. For current to flow, we need a cell to exert a force and provide energy. The Current flowing in...

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