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Question 20209
JEE Physics · Medium

Semiconductors: Effect of Temperature on Semiconductor MCQ

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Effect of Temperature on SemiconductorMediumQuestion 20209

Question

When temperature increases, the conductivity of a pure semiconductor:
  1. A
    Decreases like metals
  2. B
    Increases because more electron-hole pairs are thermally generated
    Correct
  3. C
    Stays the same
  4. D
    Becomes zero

Correct answer

Increases because more electron-hole pairs are thermally generated

Explanation

Higher temperature → more thermal energy → more covalent bond breakings → more electron-hole pairs → more carriers → lower resistance. This negative temperature coefficient (NTC) distinguishes semiconductors from metals (PTC).

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