Suppose the lowest band in a certain crystal is completely filled, but the gap between that band and the next higher one is $0.53 \mathrm{eV}$. What type of material is this?
A) A conductor
B) An insulator
C) A semiconductor

Question

Quizplus · Accepted Answer

A material with a completely filled lowest band and a gap of $0.53 \mathrm{eV}$ to the next band is an insulator. This energy gap is too large for electrons to easily jump to the next band under normal conditions, preventing electrical conductivity.

Suppose the Lowest Band in a Certain Crystal Is Completely 0.53eV0.53 \mathrm{eV}0.53eV

Suppose the Lowest Band in a Certain Crystal Is Completely $0.53 \mathrm{eV}$