Two particle of equal mass $m$ and charge $q$ are placed at a distance of $16\, cm$. They do not experience any 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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