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Three identical point particles that have charge q are at the vertices of an equilateral triangle that is circumscribed by a circle of radius a that lies in the z = 0 plane and is centered at the origin. The values of q and a are +3.10 ?C and 58.4 cm, respectively. (Assume the potential is zero very far from all charges.)
(a) What is the electric potential at the origin?
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(b) What is the electric potential at the point on the z axis at z = a?
(c) How would your answers to Parts (a) and (b) change if the charges were still on the circle but one is no longer at a vertex of the triangle? Explain your answer.
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