The electric potential difference between two parallel plates is `2000 V`. If the plates are separated by `2 mm`, then what is the magnitude of electrostatic force on a charge of `4 xx 10^(-6)C` located mid-way between the plates?
Options:
(a) `4N`
(b) `6 N`
(c) `8 N`
(d) `1.5 xx 10^(-6) N`