Engineering Interview Question:

A piece of copper and another piece of Germanium are cooled from 30C to 80 K. The resistance of
A. copper decreases and germanium increases
B. both decreases
C. both increases
D. copper increases and germanium decreases

Submitted by: Murtaza

Option A
(copper decreases and germanium increases)
Explanation:
As temperature is decreased, resistance of conductors decreases and resistance of semiconductors increases.
Submitted by: Murtaza