Thermal diffusivity of a refractory brick is high, when its ____________ is high?
Correct answer: C. Thermal conductivity
- A. Density
- B. Specific heat
- C. Thermal conductivity
- D. None of these
Explanation
Thermal diffusivity is given by α = k/(ρCp), so it increases with thermal conductivity when density and specific heat are fixed. High density or high specific heat alone would reduce diffusivity.
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