Distinguish between conductors and insulators.

Distinguish between good conductors, resistors and insulators. Name two good conductors, two resistors and two insulators.

The distinction between conductors, insulators and semiconductors is largely connected with

Explain formation of energy band in solids. Distinguish between conductors, extrinsic and intrinsic semi-conductors and insulators on the basis of band theory.

Distinguish between shadow and image.