Conductors are such materials in which the forbidden energy gap disappears as the valence band and conduction band become very close that they overlap. Examples: Copper, Aluminum. The following figure shows the structure of energy bands in conductors.

Characteristics

The following are the characteristics of Conductors.

·        There exists no forbidden gap in a conductor.

·        The valance band and the conduction band gets overlapped.

·        The free electrons available for conduction are plenty.

·        A slight increase in voltage, increases the conduction.

·        There is no concept of hole formation, as a continuous flow of electrons contribute the current.