Electronics and Communication Engineering - Exam Questions Papers - Discussion


Which of the following statements is/are true for a good conductor of electricity?

  1. Its conductivity decreases with increasing temperature.
  2. Number of free electrons is around 1028 m-3.
  3. Its conductivity decreases with addition of impurities.
  4. It is a good conductor of heat also.

[A]. 1, 2, 3 and 4
[B]. 1 only
[C]. 2 and 3 only
[D]. 3 and 4 only

Answer: Option A


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