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

Options

A. each of them increases
B. each of them decreases
C. copper increases and that of germanium decreases
D. copper decreases and that of germanium increases

Answer

D

Explanation

As temperature decreases, resistance of conductor `(Cu)` decreases and that of semiconductor `(Ge)` increases.