Two particles, each of positive charge q, are fixed in place on ay axis, one at y = d and the other at y = – d.
(a) Write an expression that gives the magnitude E of the net electric field at points on the x axis given by x = ad.
(b) Graph E versus a for the range 0 < a < 4. From the graph, determine the values of a that give
(c) The maximum value of E and
(d) Half the maximum value of E.