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October 22, 2014

Homework Help: Physics

Posted by andrea on Sunday, March 15, 2009 at 11:39pm.

idential point charges of 1.7e-6 C are fixed diagonally on opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing their magnitudes. Find the sign and magnitude of the third charge in the center of the square.

i am absolutely clueless.

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