Question

What are Intrinsic and Extrinsic semi-conductors?

Answer 1

An intrinsic semiconductor material is chemically pure and possesses poor conductivity. It has equal numbers of negative carriers (electrons) and positive carriers (holes).
Where as an extrinsic semiconductor is an improved intrinsic semiconductor with a small amount of impurities added by a process, known as doping, which alters the electrical properties of the semiconductor and improves its conductivity.