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A piece of copper and a piece of ge...

A piece of copper and a piece of germanium are cooled from temperature to 80 K . Then which one of the following is correct ?

A

Resistance of each will increase

B

Resistance of each will decrease

C

Resistance of copper will decrease while that of germanium will increase

D

Resistance of copper will increase while that of germanium will decrease

Text Solution

Verified by Experts

The correct Answer is:
C
Answer(3) Resistance of copper decrease because copper is a conductor and in conductors resistance decrease with rise in temperature. Resistance of germanium increases because it becomes insulator at high temperature and hence resistance increases.
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