Question: Three equal charges lie in the xy plane. Two are on the y axis at y = a and y = +a, and the third

Three equal charges lie in the xy plane. Two are on the y axis at y = –a and y = +a, and the third is on the x axis at x = a.

(a) What is the potential V(x) due to these charges at a point on the x axis?

(b) Find Ex along the x axis from the potential function V(x). Evaluate your answers to (a) and (b) at the origin and at x = ∞ to see if they yield the expected results

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