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Two charges, q(1) = 5 mC and q(2)= 7mC are separated by 25cm. Where should a...

Two charges, q(1) = 5 mC and q(2)= 7mC are separated by 25cm. Where should a third charge be placed on the line between them such that the resultant force on it will become zero? Does it matter if the third charge is positive or negative?

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