The magnitude of the repulsive force between two point charges with the same sign, one
Chapter 7, Problem 80(choose chapter or problem)
The magnitude of the repulsive force between two point charges with the same sign, one of size 1 and the other of size , is where is the distance between the charges and is a constant. The potential at a point due to the charge is defined to be the work expended in bringing a unit charge to from infinity along the straight line that joins and . Find a formula for .
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