ch25-p005 - 5(a The capacitance of a parallel-plate...

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5. (a) The capacitance of a parallel-plate capacitor is given by C = ε 0 A / d , where A is the area of each plate and d is the plate separation. Since the plates are circular, the plate area is A = π R 2 , where R is the radius of a plate. Thus, () ( ) 2 12 2 2 10 0 3 8.85 10 F m 8.2 10 m 1.44 10 F 144pF.
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