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A wire of Aluminium and a wire of German...

A wire of Aluminium and a wire of Germanium are cooled to a temperature of `77^@` K.

A

resistance of each of them decreases

B

resistance of each of them increases

C

resistance of aluminium wire increases and that of germanium wire decreases

D

resistance of aluminium wire decreases and that of germanium wire increases

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If wire of aluminium and a wire of germanium are cooled to a temperature of 77 K the resistance of Al decreases and resistance of Ge increases.
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