Question

Match the following

a) p-type semiconductor	1) Pure semiconductor
b) Intrinsic semiconductor	2) Doped with impurity
c) Extrinsic semiconductor	3) majority carriers are electrons
d) n-type semiconductor	4) majority carriers are holes

• A. a-3,b-2,c-4,d-1
• B. a-1,b-2,c-4,d-3
• C. a-4,b-1,c-2,d-3
• D. a-2,b-1,c-4,d-3

Answer 1

The correct option is C a-4,b-1,c-2,d-3

p-type semiconductor is doped with trivalent impurities and hence has more holes than electrons.

n-type semiconductor is doped with pentavalent impurities and hence has more electrons than holes.

Intrinsic semiconductor is a pure semiconductor whereas an extrinsic semiconductor is made by doping an intrinsic semiconductor with impurities and so it has impurities in it.