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Four point charges q(A) =2 mu C ,q(B )...

Four point charges `q_(A) =2 mu C ,q_(B )=-5 mu C, q_(c )=2 mu C` and `q_(d)=-5 mu C` are located at the corners of a square ABCD of side 10 cm. What is the force on a charge of `1 mu C` placed at the centre of the square ?

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