A sphere, a cylinder and a very thin disk are made out of the same material. Each one of them carry the same amount of charge Q , spread uniformly over their surfaces. The radius of the cylinder is identical to its height. The radii of sphere, cylinder and disk are in the ratio 1:2:3. I, II and III are points in space, very close to the sphere, curved surface of the cylinder (away from the edges) and centre of flat s