In Millikan's experiment, an oil drop having charge $q$ gets stationary on applying a potential difference $V$ in between two plates separated by a distance $d$. The weight of the drop is
  • A$\frac{q}{{Vd}}$
  • B$q\frac{d}{V}$
  • C$q\,Vd$
  • D$q\frac{V}{d}$
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