Question

What happens when some valence electrons gain enough energy as temperature increases?

Options

• They move into the conduction band, leaving behind holes.

• They prevent free charge carriers from forming.

• They become intentionally added impurity atoms.

• They make the valence band full and the conduction band empty.

Answer 1

Energy gained with rising temperature can move valence electrons into the conduction band. Each departing electron leaves a hole in the valence band.