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
