A positive charge q is fixed at the point x = 0, y = 0,and a negative charge -2q is fixed at the point x = a, y = 0.(a) Show the positions of the charges in a diagram. (b) Derive anexpression for the potential V at points on the x-axis as a func-23.21 • Ation of the coordinate x. Take V to be zero at an infinite distancefrom the charges. (c) At which positions on the x-axis is V = 0?(d) Graph V at points on the x-axis as a function of x in the rangefrom x = -2a to x = +2a. (e) What does the answer to part (b)become when x >> a? Explain why this result is obtained.

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Answered: 23.21 - A positive charge q is fixed at…

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