Calculate the potential energy of the +2uC charge at point P. Calculate the work done in moving the +2uC charge from far away to point P. Then calculate the work you would do to move a -2uC charge from fat away to point P.
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Calculate the potential energy of the +2uC charge at point P. Calculate the work done in moving the +2uC charge from far away to point P. Then calculate the work you would do to move a -2uC charge from fat away to point P.
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