Physics - Heat & Thermo Question with Solution | TestHub

Statement-1 : Two solid cylindrical rods of identical size and different thermal conductivity $K_1$ and $K_2$ are connected in series. Then the equivalent thermal conductivity of two rod system is less than the value of thermal conductivity of either rod.

Statement–2: For two cylindrical rods of identical size and different thermal conductivity $K_1$ and $K_2$ connected in series, the equivalent thermal conductivity $K$ is given by:

$$\frac{2}{K}=\frac{1}{K_1}+\frac{1}{K_2}$$