Question

The temperature drops through a two -layer furnace wall by ${900}^{o}C$. Each layer is of equal area of cross-section.Which of the following actions will result in lowering the temperature $\theta$ of the interface?

• A. By increasing the thermal conductivity of outer layer.
• B. By increasing the thermal conductivity of inner layer.
• C. By increasing thickness of outer layer.
• D. By increasing thickness of inner layer.

Answer 1

Answer: (A), (D)

The correct options are
A By increasing the thermal conductivity of outer layer.
D By increasing thickness of inner layer.