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Which material has a negative temperature coefficient of resistance?
کس مادے کا مزاحمت کے درجۂ حرارت کا ضریب منفی ہوتا ہے؟
  1. Silicon
  2. Iron
  3. Mercury
  4. None of these
Explanation
  • Silicon is a semiconductor that generally has a negative temperature coefficient of resistance.
  • As the temperature of silicon increases, more charge carriers become available, so its electrical resistance usually decreases.
  • Most pure metals, such as iron and mercury under ordinary conditions, have a positive temperature coefficient of resistance.
  • It means their resistance generally increases with temperature.

Last verified on 28-10-2026

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