Q127 / 180 · NEET 2020 (Phase 1) · Physics

The solids which have the negative temperature coefficient of resistance are:

  • A
    insulators only
  • B
    semiconductors only
  • Correct answer
    C
    insulators and semiconductors
  • D
    metals

Solution

The solids which have the negative temperature coefficient of resistance means the resistance of these solid will decrease when temperature increases due to more no of free electron at higher temperature. It happens in both insulators and semiconductors.

Hence, the correct answer is option: 'C'.

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