An Ideal Air-Filled Parallel-Plate Capacitor Consists of Two Circular Plates $0.30 \mathrm {~mm}$

Multiple Choice

An ideal air-filled parallel-plate capacitor consists of two circular plates, each of radius $0.30 \mathrm {~mm}$ How far apart should the plates be for the capacitance to be 300.0-pF? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

A) 0.0083 μm
B) 0.0042 μm
C) 0.00094 μm
D) 0.00047 μm