Consider n equal positively charged particles each of magnitude Q/n placed symmetrically around a circle of radius a. (a) compute the magnitude of the electric field at a point a distance x from the center of the circle and on the line passing during the center and perpendicular to the plane of the circle. (Use any variable or symbol stated above along with the following as necessary: ke.) E = (b) Now consider a ring of radius a that carries a uniformly distributed positive total charge Q. Recall the calculation of the electric field at point a point a distance x from the center of the ring and on the line passing during the center and perpendicular to the plane of the ring. Describe why he result in part (a) is identical to the result for the ring.