Two particles, each of positive charge q, are fixed in
Chapter , Problem 78(choose chapter or problem)
Two particles, each of positive charge q, are fixed in place on a y 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.
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