A wall is made of two equally thick layers A and B of different materials. The thermal conductivity of A is twice that of B . In the steady state the temperature difference across the wall is 3 6 ∘ C.

Question

A wall is made of two equally thick layers $A$ and $B$ of different materials. The thermal conductivity of $A$ is twice that of $B$ . In the steady state the temperature difference across the wall is $3 6^{\circ}$ C. The temperature difference across the layer $A$ will be:

Options:

Answer:

B

Solution:

$Δ T \propto \frac{1}{k}$ . So $Δ T_{A} = \frac{1}{3} \times 36 = 1 2^{\circ}$ C. B.

TestHub · Accepted Answer

Δ T ∝ k 1 ​ . So Δ T A ​ = 3 1 ​ × 36 = 1 2 ∘ C. B.

Physics - Heat & Thermo Question with Solution | TestHub

Options:

Doubts & Discussion