A piece of copper and another of germanium ar | vedclass

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(D) Copper is a metal. For metals,the resistance decreases as the temperature decreases. Therefore,when copper is cooled,its resistance decreases.Germ

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copper decreases and germanium increases

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(D) Copper is a metal. For metals,the resistance decreases as the temperature decreases. Therefore,when copper is cooled,its resistance decreases.Germanium is a semiconductor. Semiconductors have a negative temperature coefficient of resistance,meaning their resistance increases as the temperature decreases. Therefore,when germanium is cooled,its resistance increases.Thus,the resistance of copper decreases and that of germanium increases.

$A$ piece of copper and another of germanium are cooled from room temperature to $80\, K$. The resistance of :

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