The electric field due to a charge at a distance of 3 m from it is 500 N/coulomb. The magnitude of the charge is $\left[\frac{1}{4{\mathrm{\pi \epsilon }}_0}=9\times {10}^9\frac{\mathrm{N}-{\mathrm{m}}^2}{{\mathrm{coulomb}}^2}\right]$

• A

  2.5 micro-coulomb

• B

  2.0 micro-coulomb

• C

  1.0 micro-coulomb

• D

  0.5 micro-coulomb