The ratio of heat flow Q₁/Q₂ from two walls of same thickness having their thermal conductivities as K₁ - 2K₂ will be

Question

Quizplus · Accepted Answer

The heat flow through a wall is given by the formula $Q = \frac{kA\Delta T}{d}$, where $Q$ is the heat flow, $k$ is the thermal conductivity, $A$ is the area, $\Delta T$ is the temperature difference, and $d$ is the thickness of the wall. Given that the thickness, area, and temperature difference are the same for both walls, the ratio of heat flows is directly proportional to the ratio of their thermal conductivities. Thus, the ratio of heat flows is $\frac{k_1}{k_2} = \frac{2k}{k} = 2$, where $k_1 = 2k$ and $k_2 = k$.

The Ratio of Heat Flow Q1/Q2 from Two Walls of Same

The Ratio of Heat Flow Q₁/Q₂ from Two Walls of Same