The highest thermal diffusivity is of
A. Iron
B. Lead
C. Concrete
D. Wood
Answer: Option B
Solution(By Examveda Team)
Thermal diffusivity is the thermal conductivity of the material divided by the product of density and specific heat capacity, at constant pressure. The highest thermal diffusivity is of LeadThis Question Belongs to Mechanical Engineering >> Heat And Mass Transfer
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For iron:
Thermal difference = k/(den*heat cap) = 46.33/(.26*.12) = 1484.93.
For lead:
Thermal diff = k/(den*heat cap) = 20.39/(.41*.032) = 1554.12.
HENCE LEAD is correct answer.