What is the magnitude of a point charge due to which the electric field $30\,cm$ away has the magnitude $2\,newton/coulomb$ $[1/4\pi {\varepsilon _0} = 9 \times {10^9}\,N{m^2}/{C^2}]$

  • A

    $2 \times {10^{ - 11}}\,coulomb$

  • B

    $3 \times {10^{ - 11}}\,coulomb$

  • C

    $5 \times {10^{ - 11}}\,coulomb$

  • D

    $9 \times {10^{ - 11}}\,coulomb$

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