The work done in carrying a charge \( \mathrm{Q}_{1} \) once round ...

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The work done in carrying a charge \( \mathrm{Q}_{1} \) once round a circle of radius \( \mathrm{R} \) with a charge \( \mathrm{Q}_{2} \) at the centre is
\( \mathrm{P} \)
(1) \( \frac{Q_{1} Q_{2}}{4 \pi \varepsilon_{0} R^{2}} \)
(2) Zero
W
(3) \( \frac{Q_{1} Q_{2}}{4 \pi \varepsilon_{0} R} \)
(4) Infinite
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