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Copper and Germanium are cooled from roo...

Copper and Germanium are cooled from room temperature to 100 K . Then the resistance of

A

Germanium decreases , Copper increases

B

Germanium decreases , Copper decreases

C

Germanium increases , Copper decreases

D

Germanium increases , Copper increases

Text Solution

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The correct Answer is:
C
The temperature coefficient of resistance of copper is positive and of germanium is negative . Hence the resistance of germanium increases and copper decreases with fall in temperature .
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