An ideal air-filled parallel plate capacitor with a plate separation of 4.0 cm has a plate area of 0.040 m^2. What is the capacitance of this capacitor with air between these plates? (ε0 = 8.85 x 10^-12 C^2/N m^2) 89 pF 8.9 pF 0.89 pF 8.9 nF
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