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What is the amount of work done in moving a point charge around a circular arc of radius r at the centre where another point charge is located ?

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What is the amount of work done in moving a point charge around a circular arc of radius r at the centre where another point charge is located ?

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Let q1 be the charge inside the circle and q2 be the charge moving around the circular arc. Then

work down to move the charge over the circular are is zero, because it is moving over an equipotential surface.

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