A slab consists of two layers of different materials of the same thickness and having thermal conductivities $K_1$ and $K_2$ are connected in series. The equivalent thermal conductivity of the slab is

Question

Aicharya · Accepted Answer

$\begin{aligned} & 	ext { (a) : In series combination, } \frac{t}{K_1}+\frac{t}{K_2}=\frac{2 t}{K} \ & \Rightarrow \frac{1}{K_1}+\frac{1}{K_2}=\frac{2}{K} \Rightarrow K=\frac{2 K_1 K_2}{K_1+K_2} 	ext {. }\end{aligned}$ ~

A slab consists of two layers of different materials of the same thickness and having thermal conductivities…

Solution