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Q)

If a unit charge is rotated around a charge q in a circular path of radius r, then the work done will be

$\begin{array}{1 1} (a)\;\frac{q}{2 \in_0 r^2}\\ (b)\;2 \pi r\\ (c)\;zero \\ (d)\;2 \pi r q\end{array} $

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A)
$(c)\;zero$
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