Potential difference (ΔV) between the plates of the capacitor =
4.50 kV
                                                                                               Â
= 4.50 x 103 V
Electric field (E) between the plates of the capacitor = 3.05 x
106 V/m
Then the minimum separation (d) between the plates of the
capacitor is calculated as
                Â
E = ΔV / d
                Â
d = ΔV / E
                   Â
= (4.50 x 103 V) / (3.05 x 106 V/m)
                     =
1.475 x 10-3 m
                   Â
= 1.475 mm
