Conductor, Insulator, Semiconductor.

Conductor

Conductor is a device or material that can deliver an electric current. A good conductor is a material having a very small resistivity. In general, the conductive material is metal. Gold, silver, copper, aluminum, zinc, iron in a row has resistivity greater. So the material that has the best conductivity is gold, but because the price is very expensive, the copper and aluminum are economically the most widely used.

Insulator

Insulator is the type of material has a very large resistance, so that he can not deliver electricity and heat. Insulator is usually used to inhibit the flow of electricity which is used on the cable. isolator consisting of non-metal materials such as plastics, ebonite, paper, human body, water, soil.

Semiconductors

Semiconductor is a material that has electrical conductivity in between insulator and conductor.A semiconductor will have properties as an insulator at very low temperatures, but at room temperature besifat as a conductor. The most common semiconductor material used is silicon, germanium, and gallium arsenide.

Very useful in the field of semiconductor electronics, because conductivity that can be altered by injecting another material (usually called the material doping). Semiconductors are the types of materials most widely used and very important in electronic components.