A piece of copper and the other of germanium are cooled from the room temperature to 80K, then which of the following would be correct statement?

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Resistance of each increases

Resistance of each decreases

Resistance of copper increases while that of germanium decreases

Resistance of copper decreases while that of germanium increases

answer is D.

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Detailed Solution

Resistance of conductors (Cu) decreases with decrease in temperature while that of semi conductors (Ge) increases with decrease in temperature

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