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Figure shows three circular arcs, each of radius \( \mathrm{R} \) and total charge as indicated. The net electric potential at the centre of curvature is :-
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(A) \( \frac{Q}{4 \pi \epsilon_{0} R} \)
(B) \( \frac{\mathrm{Q}}{2 \pi \in_{0} \mathrm{R}} \)
(C) \( \frac{2 Q}{\pi \in_{0} R} \)
(D) \( \frac{\mathrm{Q}}{\pi \epsilon_{0} R} \)
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