Q. To a germanium crystal equal number of aluminium and indium atoms are added. Then
A) It remains an intrinsic semiconductor
B) It becomes a $n$-type semiconductor
C) It becomes a $p$-type semiconductor
D) It becomes an insulator
Explanation
(c) If trivalent impurity is mixed with pure germanium crystal, the crystal so obtained is called p-type semiconductor. Here, aluminium and indium atoms are trivalent impurity atoms.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.