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Let gravitation field in a space be given as \( E=-(\mathrm{k} / \mathrm{r}) \). If the reference point is at distance \( d_{i} \) where potential is \( V_{i} \) then
\( \mathrm{W} \) relation for potential is :
(a) \( \mathrm{V}=\mathrm{k} \ln \frac{1}{\mathrm{~V}_{\mathrm{i}}}+0 \)
(b) \( \mathrm{V}=\mathrm{k} \ln \frac{\mathrm{r}}{\mathrm{d}_{\mathrm{i}}}+\mathrm{V}_{\mathrm{i}} \)
(c) \( \mathrm{V}=\ln \frac{\mathrm{r}}{\mathrm{d}_{\mathrm{i}}}+\mathrm{kV}_{\mathrm{i}} \)
(d) \( \mathrm{V}=\ln \frac{\mathrm{r}}{\mathrm{d}_{\mathrm{i}}}+\frac{\mathrm{V}_{\mathrm{i}}}{\mathrm{k}} \)
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