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With an increase in temperature, the resistance of a pure semiconductor:

  1. A
    first increases and then decreases.
  2. B
    remains the same.
  3. C
    increases.
  4. D
    decreases.

Solution & Step-by-step Explanation

Pure intrinsic semiconductors (like Silicon and Germanium) possess a negative temperature coefficient of resistance. When the temperature increases, covalent bonds break, releasing more valence electrons into the conduction band. This increased concentration of charge carriers reduces the electrical resistance.

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With an increase in temperature, the resistance of a pure semiconductor:
A
first increases and then decreases.
B
remains the same.
C
increases.
D
decreases.

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PhysicsSemiconductorsThermal Properties

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