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NEET UG PHYSICS MCQ: CURRENT ELECTRICITY
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Statement-1: A piece of copper and other of germanium are cooled from room temperature to conductivity of copper increases and that of germanium decreases.
Statement-2: Copper has positive temperature coefficient where as germanium has negative temperature coefficient.
Statement-2: Copper has positive temperature coefficient where as germanium has negative temperature coefficient.
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Correct option: A
Statement-1 is true, Statement-2 is true, Statement-2 is the correct explanation for Statement-1
Option A is correct because copper's conductivity increases with decreasing temperature (positive temperature coefficient), while germanium's conductivity decreases (negative temperature coefficient).
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