One end of a thermally insulated rod is kept at a temperature $T_1$ and the other at $T_2$ . The rod is composed of two sections of length $l_1$ and $l_2$ and thermal conductivities $K_1$ and $K_2$ respectively. The temperature at the interface of the two section is
$\frac{{({K_2}{l_1}{T_1} + {K_1}{l_2}{T_2})}}{{({K_2}{l_1} + {K_1}{l_2})}}$
$\frac{{({K_1}{l_2}{T_1} + {K_2}{l_1}{T_2})}}{{({K_1}{l_2} + {K_2}{l_1})}}$
$\frac{{({K_1}{l_1}{T_1} + {K_2}{l_2}{T_2})}}{{({K_1}{l_1} + {K_2}{l_2})}}$
$\frac{{({K_2}{l_2}{T_1} + {K_1}{l_2}{T_2})}}{{({K_1}{l_1} + {K_2}{l_2})}}$
Surface of the lake is at $2°C$ . Find the temperature of the bottom of the lake..... $^oC$
On heating one end of a rod, the temperature of whole rod will be uniform when
Heat current is maximum in which of the following (rods are of identical dimension)
In variable state, the rate of flow of heat is controlled by
Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities $ K$ and $2K$ respectively. The equivalent thermal conductivity of the slab is