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Four equal positive point charges, each of charge 8.1 μC , are at the corners of...

Four equal positive point charges, each of charge 8.1 μC , are at the corners of a square of side 9.2 cm.

A). What charge should be placed at the center of the square so that all charges are at equilibrium? Q=__C

B). Is this a stable or unstable equilibrium in the plane?

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Thanks for asking..a 92 Cm 1 2a a : @) let chage aus Place」 at center, 2 ce 千 7-752시의 스 ヲ& | 퍄 8, JA displaced alon d horizontal( rce unbals

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