In the Ingen hausz method to compare the thermal conductivities of different substances, the length upto which wax melted is in the ratio of 2 : 5. The ratio of their thermal conductivities is

The densities of two substances are in the ratio 5 : 6 and the specific heats are in the ratio 3:5 respectively. The ratio of their thermal capacities per unit volume is

Define coefficient of thermal conductivity or thermal conductivity of a substance.

The temperature across two different slabs A and B are shown I the steady state (as shown Fig) The ratio of thermal conductivities of A and B is

The temperature across two different slabs A and B are shown I the steady state (as shown Fig) The ratio of thermal conductivities of A and B is

Explain Lee's disc method of finding the thermal conductivity of a bad conductor.

Two different rods A and B are kept as shown in figure . The variation of temperature of different cross sections with distance is plotted in a graph shown in figure . The ration of thermal conductivities of A and B is -

The ratio of thermal conductivites of two different metals is 5:3 . In order to have the same thermal resistance in these metals of equal thickness what should be the ratio of their length?

Two spheres A and B have diameters in the ratio 1:2 , densities in the ratio 2:1 and specific heat in the ratio 1:3 . Find the ratio of their thermal capacities.

Compare the ratios 3:4 and 2:5.

The ratio of the thermal conductivities of two different materials is 1 : 2 . The thermal resistance of the rods of these materials having the same thickness are equal. Find the ratio of the length of rods.