The forbidden gap within germanium and silicon are 0.7 eV and M eV respectively. It implies that

Question

The forbidden gap within germanium and silicon are 0.7 eV and M eV respectively. It implies that (A) both silicon and germanium are perfect conductors at very low temperatures but very good insulators at room temperatures (B) both silicon and germanium are perfect insulators at all temperatures (C) both silicon and germanium are perfect insulators at low temperatures but start conduction at room temperatures with silicon somewhat better conductor than germanium. (D) same as (3) above but with germanium showing better conductivity at room temperature.

Tardigrade Admin · Accepted Answer

Correct answer is (d) same as (3) above but with germanium showing better conductivity at room temperature.

Q. The forbidden gap within germanium and silicon are 0.7eV and MeV respectively. It implies that

both silicon and germanium are perfect conductors at very low temperatures but very good insulators at room temperatures

both silicon and germanium are perfect insulators at all temperatures

both silicon and germanium are perfect insulators at low temperatures but start conduction at room temperatures with silicon somewhat better conductor than germanium.

same as (3) above but with germanium showing better conductivity at room temperature.

Correct answer is (d) same as (3) above but with germanium showing better conductivity at room temperature.

Q. The forbidden gap within germanium and silicon are $0.7 e V$ and $M e V$ respectively. It implies that