A) \[n\]-type of semiconductor
B) p-type semiconductor
C) insulator
D) intrinsic semiconductor
Correct Answer: B
Solution :
If an impurity atom with 3 valence electron is used in germanium crystal is it replaces one of the germanium atom. As one of atom is not replaced by indium atom. Hence, the atom form a hole and indium impurity in germanium makes it into a p-type semiconductor.
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