Resistance to heat flow by conduction is proportional to (where t...

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Resistance to heat flow by conduction is proportional to (where, t & $$\rho $$ are thickness & density of the material respectively and A = area normal to the direction of heat flow.)

A. t

B. $$\frac{1}{\rho }$$

C. $$\frac{1}{{\text{A}}}$$

D. All of the above

Answer: Option D

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