Chapter 22, Problem 11Q

In Fig. 22-30a, a circular plastic rod with uniform charge +Q produces an electric field of magnitude E at the center of

Figure 22-30 Question 11.

curvature (at the origin). In Figs. 22-30b, c, and d, more circular rods, each with identical uniform charges +Q, are added until the circle is complete. A fifth arrangement (which would be labeled e) is like that in d except the rod in the fourth quadrant has charge −Q. Rank the five arrangements according to the magnitude of the electric field at the center of curvature, greatest first.