A thin nonconducting rod with a uniform distribution of positivecharge Q is bent into a circle of radius R (see the figure). Thecentral perpendicular axis through the ring is a z axis, with theorigin at the center of the ring. What is the magnitude of theelectric field due to the rod at (a) z = 0 and (b) z = ∞? (c) Interms of R, at what positive value of z is that magnitude maximum?(d) If R = 2.20 cm and Q = 4.30 μC, what is the maximummagnitude?
