At what rate does the electric field change between the plates of a square capacitor of side 5 cm if the plates are spaced 1.2 mm apart and the voltage across them is changing at a rate of 60 V?
a) 2.5 × 10⁵ V/m²s
b) 5.0 × 10⁵ V/m²s
c) 7.5 × 10⁵ V/m²s
d) 1.0 × 10⁶ V/m²s
