The charge on a particle $Y$ is double the charge on particle $X$. These two particles $X$ and $Y$,after being accelerated through the same potential difference,enter a region of uniform magnetic field and describe circular paths of radii $R_1$ and $R_2$ respectively. The ratio of the mass of $X$ to that of $Y$ is

  • A
    $(\frac{2R_1}{R_2})^2$
  • B
    $(\frac{R_1}{2R_2})^2$
  • C
    $\frac{R_1^2}{2R_2^2}$
  • D
    $\frac{2R_1}{R_2}$

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