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5. A charge (-9) and another charge(+Q) are kept at two points A and B, respectively keeping the charge (+Q) fixed at B, the charge (-9) at A is moved to another point Csuch that ABC forms an equilateral triangle of sidel. The net work done in moving the charge(-9) is 1 Qq 1 Qg Qq (a) (b) (c) Qal (d) zero 1 4 12 1 41 EO 4T EO