Multiple choice

In which of the following substances the electrical conductivity is due to the presence of impurities and defects?

  1. Semiconductors

  2. Insulator

  3. Metallic conductors

  4. Electrolytic conductors
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A Correct answer
Explanation

The electrical conductivity of semiconductors is due to the presence of impurities and defects. Their conductivity increases with increase in temperature as the defects increase with the increase in temperature.

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