Electronic Devices and Circuits - Engineering

Q1:

Addition of a small amount of antimony to germanium will result in

A formation of P-type semiconductor

B more free electrons than holes in the semiconductor

C antimony concentrating on the edges of the crystals

D increased resistance

ANS:B - more free electrons than holes in the semiconductor

Answer should be B more free electrons than holes in the semiconductor.

Because addition of antimony (pentavalent impurity) will result in N-type semiconductor.