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Q. A uniform electric field with a magnitude of 250 N/C is directed in the positive x direction. A 12 uC charge moves from the origin to the point(20.0 cm, 50.0 cm). what is the change in the electrical potential energy of the system as a result of the change in position of this charge?

Q. Two identical point charges are fixed to diagonally opposite corners of a square that is 0.500 m on a side. Each charge is +3.0 x 10-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?

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