Question: 19
(Choose 1 answer)
In a semiconductor, what is the role of the valence band?
A. It contains electrons that are free to move and conduct electricity.
B. It is the highest energy band that is completely empty at absolute zero temperature.
C. It is the band where electrons are bound to atoms but can jump to the conduction band when energy is
supplied.
D. It lies above the conduction band and is responsible for electrical conductivity.
