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A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance
  • a)
    of each of them decreases
  • b)
    of each of them increases
  • c)
    copper increases and that of germanium decreases
  • d)
    copper decreases and that of 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...
  • Copper is a conductor and we know that for conductors, resistance is directly proprtional to temperature. Therefore on decreasing temperature resistance also decreases.
  • Whereas, germanium is a semiconductor and for semiconductors, resistance is inversely proportional to temperature.
  • So on decreasing temperature resistance increases.
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A piece of copper and another of germanium are cooled from room temperature to 80K. The resistancea)of each of them decreasesb)of each of them increasesc)copper increases and that of germanium decreasesd)copper decreases and that of germanium increasesCorrect answer is option 'D'. Can you explain this answer?
Question Description
A piece of copper and another of germanium are cooled from room temperature to 80K. The resistancea)of each of them decreasesb)of each of them increasesc)copper increases and that of germanium decreasesd)copper decreases and that of 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 resistancea)of each of them decreasesb)of each of them increasesc)copper increases and that of germanium decreasesd)copper decreases and that of 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 resistancea)of each of them decreasesb)of each of them increasesc)copper increases and that of germanium decreasesd)copper decreases and that of germanium increasesCorrect answer is option 'D'. Can you explain this answer?.
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