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A point charge q1 is held stationary at the origin. A second charge q2 is placed...

A point charge q1 is held stationary at the origin. A second charge q2 is placed at point a, and the electric potential energy of the pair of charges is +5.4×10−8J. When the second charge is moved to point b, the electric force on the charge does −1.9×10−8J of work.

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