Q.

What is done to create an extrinsic semiconductor?

A. refractive index is decreased
B. doping the material with impurities
C. increase the band-gap of the material
D. stimulated emission
Answer» B. doping the material with impurities
Explanation: an intrinsic semiconductor is a pure semiconductor. an extrinsic semiconductor is obtained by doping the material with impurity atoms. these impurity atoms create either free electrons or holes.
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