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A charge of 8 mC is located at the origi...

A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of `-2 xx 10^(-9)` C from a point P (0, 0, 3 cm) to a point Q (0, 4 cm, 0), via a point R (0, 6 cm, 9 cm)

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1.2 J, the point R is irrelevant to the answer
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