ULELJILI VOLUCIUPE ULVULCI After observing the object in the picture, what physical properties best describe the object? (1 point) © mphillips007 / iStock 2018 O Oval, soft, white, gray, and rough Round, white, gray, smooth, and soft OSmooth, rough, white, gray, and rectangular White, gray, hard, smooth, and oval

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c