Home Physics Current Electricity Karnataka - CET Previous Year Question Copper and Germanium are cooled from room te…
Physics Current Electricity Karnataka - CET Previous Year Question MCQ (Single Correct)

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

A
Germanium decreases, Copper increases
B
Germanium decreases, Copper decreases
C
Germanium increases, Copper decreases
D
Germanium increases, Copper increases.

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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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