Energy Density: Each Plate of an Air-Filled Parallel-Plate Air Capacitor

Multiple Choice

Energy density: Each plate of an air-filled parallel-plate air capacitor has an area of 0.0040 m², and the separation of the plates is 0.080 mm. An electric field of 5.3 × 10⁶ V/m is present between the plates. What is the energy density between the plates? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

A) 124 J/m³
B) 84 J/m³
C) 170 J/m³
D) 210 J/m³
E) 250 J/m³