The electrical conductivity of a ______________ decreases with rise in temperature?
Correct answer: B. Metal/alloy
- A. Semi-conductor
- B. Metal/alloy
- C. Dielectric
- D. None of these
Explanation
Metals and alloys conduct mainly through free electrons, whose increased thermal motion at higher temperature increases scattering and lowers conductivity. Semiconductors usually show the opposite trend because more charge carriers become available.
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