SOLUTION

• In the case of conductors, no forbidden band is there and the valence and conduction bands overlap each other.
• Here a large number of free electrons are available for electric conduction, and electrons from the valence band freely enter into the conduction band.
• Now since in the case of conductors, there is no forbidden band, so holes are not created at all and the total flow of current is due to the motion of electrons only.
• The energy gap between valence band and conduction band in conductors is zero.