WBCS.LIVE practice question

With increase in temperature the resistance of a pure semiconductor

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. first increases and then decreases
  2. remains the same.
  3. increases.
  4. decreases

Correct answer and explanation

Correct answer: decreases

Explanation: āœ… Correct Answer: D) decreases šŸ“š Explanation: In a pure semiconductor, an increase in temperature causes more electrons to gain enough energy to move and conduct electricity. This increase in the number of charge carriers leads to a decrease in electrical resistance. This behavior is the opposite of metallic conductors, where resistance increases with heat. This property is vital for the functioning of modern electronic devices like transistors.