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

Options

A. each ot these decreases
B. copper strip increases and that of germanium decreaseses
C. copper strip decreases and that of germanium increases
D. each of these increases

Answer

C

Explanation

Copper is conductor and germanium is semiconductor . When cooled, the resistance of cooper strip decreases and that of germanium increases.