The figure shows a system of two concentric spheres of radii `r_1 and r_2` are kept at temperature `T_1 and T_2`, respectively. The radial rate of flow of heat in a substance between the two concentric spheres is proportional to

The figure shows a system of two concentric spheres of radii r 1 ​ and r 2 ​ and kept at temperature T 1 ​ and T 2 ​ , respectively. The radial rate of flow of heat in a substance between the two concentric spheres, is proportional to:

Figure shows a system of two concentric spheres of radii r_(1)" and "r_(2) at the temperatures T_(1)" and "T_(2) , respectively. The radial rate of flow of heat in a substance filled between the two concentric spheres is proportional to

A system consists of two concentric spherical shells of radii a and b (b>a) maintained at tempareture T_1 and T_2 respectively.The radial rate of flow of heat through subtance between the two concentric spherical shells is proportional to

Solve the foregoing problem for the case of two concentric spheres of radii R_1 and R_2 and temperatures T_1 and T_2 .

The volume of the regtion between two concentric spheres of radii 2 and 5 is

Two spheres of the same material having radii r and 4r and temperature 2T_(0) and T_(0) respectively. The ratio of rate of radiation of energy by the sphere is

Two concentric conducting spheres of radii R and 2R are crrying charges Q and -2Q , respectively. If the charge on inner sphere is doubled, the potetial differece between the two spheres will