Electric charge is distributed uniformly on the surface of a spherical rubber ballon. Show how the value of electric intensity and potential vary (i) on the surface (ii), inside and (iii) outside ?

Explanation

On the surface, E = constant, V = constant. Inside the surface , E = 0, V = constant = potential on the surface. Outside the ballon,
`E prop (i)/(r^(2)) and V prop (1)/(r )` where r is distance of point from the center of the ballon.