Two point charges of equal magnitude are located along the y axis equal distances above and below

Question:

Two point charges of equal magnitude are located along the y axis equal distances above and below the x axis, as shown in Figure P25.30.
(a) Plot a graph of the potential at points along the x axis over the interval -3a (b) Let the charge located at - a be negative and plot the potential along the y axis over the interval -4a
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