Question

Which of the following is true regarding insulators?

(a) The valence band is partially filled with electrons

(b) The conduction band is partially filled with electrons

(c) The conduction band is filled with electrons and valence band empty

(d) The conduction band is empty and valence band is filled with electrons

I have been asked this question in homework.

I'd like to ask this question from Classification of Metals, Conductors and Semiconductors in division Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer 1

Right option is (a) The valence band is partially filled with electrons

The best explanation: In insulators, the conduction band is empty and the valence band is filled with electrons. The other options do not correspond to the concept of insulators, but rather conductors and semiconductors.