[" Two black metallic spheres of radius "4" the rate "],[[" 2"000K" and "1m" at "4000K" will have rat "],[" energy radiation as "]]

Two black metallic spheres of radius 4m, at 2000 K and 1m at 4000 K will have ratio of energy radiation as

A hot metallic sphere of radius r radiates heat. It's rate of cooling is

Two spheres of same material have radii 1m and 2m are at temperature of 2000K and 1000K respectively.The ratio of energy radiated in unit time is

Two spheres of same material have radii 1m and 2m are at temperature of 2000K and 1000K respectively.The ratio of energy radiated in unit time is

The ratio of masses of two metal spheres A and B is 8 : I. If their temperatures are 2000 K and 1000 K respectively, then the ratio of the rates of their energy emission will be

The ratio of masses of two metal spheres A and B is 8 : I. If their temperatures are 2000 K and 1000 K respectively, then the ratio of the rates of their energy emission will be

Two spheres of the same material have radii 1m and 4m and temperatures 4000K and 2000K respectively. The ratio of the energy radiated per second by the first sphere to that by the second is

Two spheres of the same material have radii 1m and 4m and temperatures 4000K and 2000K respectively. The ratio of the energy radiated per second by the first sphere to that by the second is

Two spheres of the same material have radii 1m and 4m and temperatures 4000K and 2000K respectively. The ratio of the energy radiated per second by the first sphere to that by the second is