The quantity of heat which crosses unit area | vedclass

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Question

(B) According to Fourier's law of heat conduction,the rate of heat flow $\frac{dQ}{dt}$ through a material is given by the formula: $\frac{dQ}{dt} = -

Vedclass · Accepted Answer

The temperature gradient perpendicular to the area

Vedclass · Answer

(B) According to Fourier's law of heat conduction,the rate of heat flow $\frac{dQ}{dt}$ through a material is given by the formula: $\frac{dQ}{dt} = -KA \frac{d	heta}{dx}$.Here,$K$ is the thermal conductivity,$A$ is the area,and $\frac{d	heta}{dx}$ is the temperature gradient.For a unit area $(A = 1)$,the quantity of heat crossing the area per unit time is proportional to the temperature gradient $\frac{d	heta}{dx}$ perpendicular to the surface.Therefore,the correct option is $B$.

The quantity of heat which crosses unit area of a metal plate during conduction depends upon

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