What charge would be required to electrify a sphere of radius 25 cm, so as to get a surface charge density of `(3)/(pi)Cm^(-2)`?

What charge would be required to electrify a sphere of radius 25 cm, so as to get a surface charge density of 3/pi C/m^2 ?

What charge would be required to electrify a sphere of radius 25 cm. So as to get a surfce chare density of (3)/(pi )cm^(-3) ?

What charge would be required to electrify a sphere of radius 15 cm so as to get a surface charge density of (7)/(11) mu Cm^(-2) ?

To what potential, must we charge an insulated sphere of radius 14 cm so that its surface charge density of 1 muC m^(-2) ?

To what potential we must charge an insulate sphere of radius 14 cm, so that the surface charge density is equal to 2 muC m^(-2) ?

What will be the surface density of charge of a sphere of radius 4 cm, if it is given 182 esu of charge?

How much charge is to be given to a sphere of radius 30 cm so that its surface density of charge will be 2/pi CGS unit?

A charge Q is placed at the centre of an uncharged, hollow metallic sphere of radius a. (a) Find the surface charge density on the inner surface and on the outer surface. (b) If a charge q is put on the sphere, what would be the surface charge densities on the inner and the outer surface?