What is allowed energy band?

What are energy bands? Explain the formation of energy bands in case of silicon crystal.

Draw a labelled energy band diagram for an insulator,a conductor and a semiconductro.

The lowest unfilled energy band formed just above the valence band is called conduction band. (True/false)

On the basis of the energy band diagrams distinguish between metals, insulators and semiconductors.

What is wind energy? What is the advantage of wind energy?

Explain the formation of energy bands in solids and hence define conduction band and valence band.

Distinguish between conductor and semiconductor on the basis of their energy bands.