Question

In semiconductor the valance band at $0K$ is

• A. completely filled
• B. completely empty
• C. partially filled
• D. nothing can be said

Answer 1

The correct option is A completely filled

The reason is that their electrons are present in valance band not in $0$ kelvin$.$ And the reason for their presence is that the band gap of semiconductors is moderate while for insulators this is very large and at $0$ kelvin there is no thermal energy or simply we say they do not have energy to reach the conduction band$.$

Hence,

option $\left(A\right)$ is correct answer.