Determine where a third charge should be placed

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Problem: A point charge +6.2uC is placed at the origin, and a second charge -3.9uC is placed in the x-y plane at (0.30m, 0.45m).

Part A: Where a third charge should be placed in the plane so that the net force acting on it is zero?

I known the correct answer but I need to know how to get that. Thanks in advance!

Reference no: EM13698568

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