When a semiconductor is doped with a donor impurity, the number of _____.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → the holes decrease and the electrons increase
When a semiconductor is doped with a donor impurity (pentavalent atom), it donates extra electrons to the conduction band.
This increases the number of electrons and decreases the number of holes due to recombination.
Answer: ☀ the holes decrease and the electrons increase