A positive charge q is fixed at the point x = 0, y = 0,...

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Physics

A positive charge q is fixed at the point x = 0, y = 0, and anegative charge -2q is fixed at the point x = a, y = 0.

a) Derive an expression for the potential V at pointson the x -axis as a function of the coordinate x. Take V to be zero at an infinite distance from thecharges. (Express your answer in terms of the given quantities andappropriate constants).

V(x) =

b) At which positions on the x -axis is V = 0?(Enter your answers numerically separated by commas).

x/a =

c) What does the answer to part A become whenx>>a ?

V =

d) Explain why this result is obtained.

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3.6 Ratings (372 Votes)
a Considering the image aboveIn generalIs important to know that the denominator    See Answer
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