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Calculating electic potential charges on point particles

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Two point particles, each with charge Q, are placed at positions +- a x.

A) What is the elctric potential anywhere along the y axis?

B) How much energy does it take to move a thrid particle, charge Q, from infinity to a position in order to make an equilateral triangle among the charges? (ie. all edges have length 2a)

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Solution Summary

Energy that is estimated in two point particles are given. How much energy it takes to move a third particle is determined.

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A) uppose at position y, the potential due to the charge at a will be k*Q/Sqrt(y*y+a*a),where k=1/(4*pi*(dielectric constant))
Similarly, the potential due to the ...

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