A point source of heat of power P is placed at the centre of a spherical shell of mean radius R. The material of the shell has thermal conductivity K. If the temperature difference between the outer and inner surface of the shell in not to exceed T, the thickness of the shell should not be less than .......

A point source of heat of power P is placed at the centre of a thin spherical shell of a mean radius R. The material of the shell has thermal conductivity K. Calculate the thickness of the shell if the temperature difference between the outer and inner surfaces of the shell in steady - state is T.

A point source of heat is placed at the centre of a spherical shell of mean radius 10 cm. the material of the shell has thermal conductivity 9.5 xx10^(-2) kcal/ m-s^(@)C . Calculate the power of point source of heat, when the temperature difference between the outer and inner surface of the shell is 50^(@)C in steady state. the thickness of shell is 2 cm.

A point source of heat is placed at the centre of a spherical shell of mean radius 10 cm. the material of the shell has thermal conductivity 9.5 xx10^(-2) kcal/ m-s^(@)C . Calculate the power of point source of heat, when the temperature difference between the outer and inner surface of the shell is 50^(@)C in steady state. the thickness of shell is 2 cm.

A thick spherical shell has inner radius a and outer b. The material has resistivity rho . When a potential difference is applied between the inner and outer surfaces, its resistance is

A point charge +q is placed at the centre of a conducting spherical shell of inner radius a and outer radius b. Find the charge appearing on the inner and outer surface of the shell.

A point charge +q is placed at the centre of a conducting spherical shell of inner radius a and outer radius b. Find the charge appearing on the inner and outer surface of the shell.

A point charge q is placed at a distance of r from the centre O of an uncharged spherical shell of inner radius R and outer radius 2R. The electric potential at the centre of the shell will be

A point charge q is placed at a distance of r from the centre O of an uncharged spherical shell of inner radius R and outer radius 2R. The electric potential at the centre of the shell will be