Question

Difreence b/w the energy band of metals semicondustor and insulator

Answer 1

Conductors(metals): In energy band of metals the valence band and conduction band will be together where energy difference will be 0 ev.
Insulators: between conduction band and valence band the energy difference will be >3 ev.
Semiconductor : the energy difference between conduction and valence band will be<3 ev. Approximately (1.5ev).