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Question: Answered & Verified by Expert
A piece of copper and another of germanium are cooled from room temperature to 77  K. The resistance of
PhysicsSemiconductorsJEE Main
Options:
  • A each of them increases
  • B each of them decreases
  • C copper decreases and of germanium increases
  • D copper increases and of germanium decreases
Solution:
1175 Upvotes Verified Answer
The correct answer is: copper decreases and of germanium increases
Copper is a conductor.
Germanium is a semiconductor
When cooled, the resistance of copper decreases and that of germanium increases.

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