The Solid State - Result Question 40
####40. On doping Ge metal with a little of In or Ga, one gets
[1993]
(a) p-type semi conductor
(b) $n$-type semi conductor
(c) insulator
(d) rectifier
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Solution:
- (a) p-type of semiconductors are produced by adding impurity containing less electrons (i.e. atoms of group 13).
Ge belongs to Group 14 and In to Group 13. Hence, on doping, $p$-type semiconductor is obtained.
