Question

The intensity of electric field required to balance a proton of mass 1.7 × 10⁻²⁷kg and charge 1.6 × 10⁻¹⁹C is nearly.
a. 1 × 10⁵V/m
b. 1 × 10⁻⁵V/m
c. 1 × 10⁷V/m
d. 1 × 10⁻⁷V/m