Question

A piece of copper and another germanium are cooled from room temperature to $80$ K. The resistance of.

• A. Each of them increases
• B. Each of them decreases
• C. Copper increases and germanium decreases
• D. Copper decreases and germanium increases

Answer 1

The correct option is D Copper decreases and germanium increases

[D] As temperature decreases, resistance decreases in case of copper (conductors) & increases with decrease of temperature in case of germanuim

(semi conductor.)