Two metal spheres of radii $R_1$ and $R_2$ are charged to the same potential. The ratio of charges on the spheres is

  • A
    $\sqrt{R_1} : \sqrt{R_2}$
  • B
    $R_1 : R_2$
  • C
    $R_1^2 : R_2^2$
  • D
    $R_1^3 : R_2^3$

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