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[" 7A charge "Q" is divided into two par...

[" 7A charge "Q" is divided into two parts of "q" and "-q" .If the "],[" coulomb repulsion between them when they are "],[" separated is to be maximum,the ratio of "(Q)/(q)" should be "],[[" (a) "2," (b) "(1)/(2)," (c) "4," (d) "(1)/(4)]]

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