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.

Answer 1

Answer: (D)

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