Fourier's law of heat conduction is (where Q = Amount of heat flow through the b

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Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

Options:

A . k. A. (dx/dT)

B . k. (dx/dT)

C . k. (dT/dx)

D . k. A. (dT/dx)

Answer: Option D

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