AAI ATC Junior Executive 2016 Shift 1 Paper

Two parallel plates (each of area 400 cm²) of a capacitor are given equal and opposite charges of magnitude 3.56 μC. The space between the plates is filled with a dielectric. If the electric field in the dielectric is 1.2 × 10⁶ V/m, what is the dielectric constant of the material? (ε₀ = 8.85 × 10^-12 F/m)