Question

According to Fourier’s law, Q = kA(T₁ − T₂)t/x. Which conclusion about heat flow is most consistent in practical situations?

Options

• Heat flow does not depend on material

• Heat flow increases with larger k, larger A, larger ΔT, and smaller x

• Heat flow increases when temperature difference decreases

• Heat flow increases when thickness increases

Answer 1

Heat flow increases with larger k, larger A, larger ΔT, and smaller x

Explanation:

Fourier’s law shows heat flow is proportional to thermal conductivity, area, and temperature difference, and inversely proportional to thickness.