A charged particle of mass 0.003g is held stationary in a space by placing it in a downward direction of electric field of \(6×10^4NC^{-1}\). Then, the magnitude of charge is:
(A) \(5×10^4 C\)
(B) \(5×10^{-10}C\)
(C) \(5×10^{-6} C\)
(D) \(5×10^{-9} C\)