Semiconductor

The materials whose characteristics are between those of conductor and insulator is known as semiconductor in other words the materials which have high resistance than conductor and less resistance than that of insulator is called semiconductor.
With respect to valance band those materials are called semiconductor in which only four electrons are present in his last orbit germanium, silicon and carbon are examples of semiconductor

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Insulator

The materials which have very few free electrons are called insulator. In other words these materials are not conduct easily. Those materials which have eight valance electrons are known as good insulator. Glass, mica, rubber and plastic is the some examples of insulator. With respect to valance band those materials are called insulator in which greater than four electrons are present in his last orbit.

Electric Circuits And Networks

Conductor:
The materials which have many free electrons are called conductor. In other words these materials are conduct easily. Those materials which have only one valance electron are known as good conductor. For example copper, silver and gold.

With respect to valance band those materials are called conductor in which less than four electrons are present in his last orbit.

Electric Circuits And Networks

Conductor:
The materials which have many free electrons are called conductor. In other words these materials are conduct easily. Those materials which have only one valance electron are known as good conductor. For example copper, silver and gold. With respect to valance band those materials are called conductor in which less than four electrons are present in his last orbit.