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

A charge of 8mC is located at the origin. Calculate the workdone in taking a small charge of `-2xx10^-9C` from a point P(0,03cm) to a point `Q(0,4 cm,0)` Via a point `R(0,6cm,9cm)`.

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1.2 J, the point R is irrelevant to the answer
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