Answer: A particle of positive charge Q is fixed at point
Chapter , Problem 90(choose chapter or problem)
A particle of positive charge Q is fixed at point P. A second particle of mass m and negative charge -q moves at constant speed in a circle of radius 1'10 centered at P. Derive an expression for the work W that must be done by an external agent on the second particle to increase the radius of the circle of motion to 1'2'
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