Rubber, plastic and glass are good examples of these materials.  

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Rubber, plastic and glass are all good examples of insulators or insulating materials. These materials do not conduct electricity, as opposed to conductors or conducting materials (such as copper, aluminum, etc.). The insulators are used to break the electrical connection or provide insulation against current flow. This is the reason...

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Rubber, plastic and glass are all good examples of insulators or insulating materials. These materials do not conduct electricity, as opposed to conductors or conducting materials (such as copper, aluminum, etc.). The insulators are used to break the electrical connection or provide insulation against current flow. This is the reason why we wear rubber sleepers or shoes while working with electricity (so that we do not get electrical shock and consequent injuries). This is also why the electrical cables are covered with a layer of rubber (to insulate them). And also why the ladders have rubber shoes, especially when we have to work with electricity. Insulators do not have free electrons and hence do not conduct electricity.

Conductors, on the other hand, have free electrons and thus easily conduct electricity. These are used to complete electrical circuits and allow flow of electricity. That is why copper or aluminum wires are used for electricity supply.

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