With increase in temperature, the thermal conductivity of non-metallic amorphous solids_________________?
Correct answer: B. Increases
- A. Decreases
- B. Increases
- C. Remain constant
- D. First decreases upto certain temperature and then increases
Explanation
In non-metallic amorphous solids, heat is carried mainly by lattice vibrations, and their thermal conductivity generally increases with temperature over the usual engineering range. Metals show the opposite general trend because electron scattering increases with temperature.
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