Question

Doping Si or Ge with As or P will produce
A. p-type semiconductor Ge and n-type semiconductor Si
B. n-type semiconductor Ge and p-type semiconductor Si
C. n-type semiconductor Ge and n-type semiconductor Si
D. p-type semiconductor Ge and p-type semiconductor Si.

Answer 1

Correct Answer - C
Doping si or Ge(both with 4 valence electrons) with As or P (with 5 valence electrons) will produce n-type semiconductor in both cases.