The electric field due to a charge at a distance of 3 m from it is `500 NC^(-1)`.

The electric field due to a charge at a distance of 3 m from it is `500 NC^(-1)`. The magnitude of the charge is `[(1)/(4 pi epsi_(0)) = 9 xx 10^(9) N - m^(2)//C^(2)]`