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A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance of
  • a)
    each of them increases
  • b)
    each of them decreases
  • c)
    copper increases and germanium decreases
  • d)
    copper decreases and germanium increases
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A piece of copper and another of germanium are cooled from room temper...
We know, a piece of copper is a metal while that of germanium is a semiconducting material. For metals resistance increases with increase in temperature. The semiconductor has a negative temperature coefficient of resistance. Hence, when it is cooled its resistance increases.
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Community Answer
A piece of copper and another of germanium are cooled from room temper...
Resistance of conducter decreases and resistance of semiconductor increases with decrease in temperature..

Here copper is a conducter n germanium is a semiconductor..

So d is correct..
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A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance ofa)each of them increasesb)each of them decreasesc)copper increases and germanium decreasesd)copper decreases and germanium increasesCorrect answer is option 'D'. Can you explain this answer?
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A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance ofa)each of them increasesb)each of them decreasesc)copper increases and germanium decreasesd)copper decreases and germanium increasesCorrect answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance ofa)each of them increasesb)each of them decreasesc)copper increases and germanium decreasesd)copper decreases and germanium increasesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance ofa)each of them increasesb)each of them decreasesc)copper increases and germanium decreasesd)copper decreases and germanium increasesCorrect answer is option 'D'. Can you explain this answer?.
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