In insulators (a) valence band is empty and conduction band is filled with electrons. (b) conduction band is empty and valence band is completely filled with electrons. (c) valence band is partially filled. (d) conduction band is partially filled with electrons.

Answer: (b). In an insulator all valence electrons are tightly bound, so the valence band is completely filled. The large gap keeps electrons from reaching the conduction band, so it stays empty. So the answer is (b).

In insulators | MHT CET 2023 (10 May, Shift 1)

Q9MHT CET 2023 · 10 MAY · SHIFT 1Easy

Energy Bands in Solids

In insulators

Show answer and solution

Answer: (b)

In an insulator all valence electrons are tightly bound, so the valence band is completely filled.
The large gap keeps electrons from reaching the conduction band, so it stays empty.
So the answer is (b).

Report a mistake

Energy Bands in Solids question from MHT CET 2023 (10 May, Shift 1)

More questions on Energy Bands in Solids