Suppose you design an apparatus in which a uniformly charged disk of radius R is to produce an electric eld. The eld magnitude is most important alongthe central perpendicular axis otthe disk, at a point P at distance 2.30}? from the disk (see Figure (all. Cost analysis suggests thatyou switch to a ring ofthe same outer radius R but with inner radius REED [see Figure {bl}. Assume that the ring will have the same surface charge density as the original disk. If you switch to the ring, by what partwill you decrease the electric eld magnitude at P? (a) (5) Number n Units u