Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-fact-Medium-Class 12
In a p-type semiconductor, what primarily causes the density of holes in the valence band at room temperature?
A
Ionisation of acceptor atoms
B
Excess of electrons from the conduction band
C
Temperature-induced electron movement
D
Doping with pentavalent impurities
Correct Answer
Option A
Detailed Explanation
At room temperature, most of the acceptor atoms in a p-type semiconductor get ionised, which leaves holes in the valence band, thus the density of holes is predominantly due to the ionisation of acceptor atoms.
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