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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

D

Resistance of copper will increase while that of germanium will decrease

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The correct Answer is:
C
Copper is a conductor and germanium is semiconductor . When both are cooled from room temperature to 80 K . Then resistance of copper will decrease while that of germanium will increase .
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