Question

Extrinsic semiconductor made from intrinsic semiconductor by -

• A. Heating above critical temperature
• B. doping with other specific elements.
• C. Increasing the pressure
• D. mixing it with any insulator.

Answer 1

The correct option is B

doping with other specific elements.

In semiconductors like Silicon when doped with 15th or 13th group elements, it have free $e^{-}$ which help in conducting electricity and these type of semiconductors are called extrinsic semiconductors.