Solid State Question 36
Question: What is the energy gap between valence band and conduction band in crystal of insulators-
Options:
A) Both the bands are overlapped with each other
B) Very small
C) Infinite
D) Very large
Show Answer
Answer:
Correct Answer: D
Solution:
[d] When insulators (non metal atoms) interact to form a solid, their atomic orbitals mix to form two bunch of orbitals, separated by a large band gap. Electrons cannot therefore be promoted to an empty level, where they could move freely.
BETA
