Two particles of equal mass $m$ and charge $q$ are placed at a distance of $16 \, cm$. They do not experience any net force. The value of $\frac{q}{m}$ is

  • A
    Zero
  • B
    $\sqrt{\frac{\pi \varepsilon_0}{G}}$
  • C
    $\sqrt{\frac{G}{4\pi \varepsilon_0}}$
  • D
    $\sqrt{4\pi \varepsilon_0 G}$

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