A thin nonconducting rod with a uniform distribution of positivecharge Q is bent into a circle of radius R (seethe figure). The central perpendicular axis through the ring is az axis, with the origin at the center of the ring. What isthe magnitude of the electric field due to the rod at(a) z = 0 and (b)z = ∞? (c) In terms of R, atwhat positive value of z is that magnitude maximum?(d) If R = 2.19 cm and Q = 4.18μC, what is the maximum magnitude?
