What is the magnitude of an electrostatic force experienced by one elementary charge at a point in an electric field where the field intensity is 3.0 x 10³ N/C?

a) 1.0 x 10³ N
b) 1.6 x 10⁻¹⁹ N
c) 3.0 x 10³ N
d) 4.8 x 10⁻¹⁶ N