Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, $$\rho $$ = Density of substance, S = Specific heat and k = Thermal conductivity)
A. $${\text{h}} = \frac{{\text{k}}}{{\rho {\text{S}}}}$$
B. $${\text{h}} = \frac{{\rho {\text{S}}}}{{\text{k}}}$$
C. $${\text{h}} = \frac{{\text{S}}}{{\rho {\text{k}}}}$$
D. $${\text{h}} = \frac{{\rho {\text{k}}}}{{\text{S}}}$$
Answer: Option A
Solution (By Examveda Team)
Thermal Diffusivity is defined as the ratio of heat conducted to the heat energy stored per unit volume of a material.The thermal conductivity of a substance divided by the product of its density and its specific heat capacity.
Thermal diffusivity of a substance is given by $${\text{h}} = \frac{{\text{k}}}{{\rho {\text{S}}}}$$
(Where h = Thermal diffusivity, $$\rho $$ = Density of substance, S = Specific heat and k = Thermal conductivity)
This Question Belongs to Mechanical Engineering >> Heat And Mass Transfer
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