Consider a parallel-plate capacitor constructed from two circular metal plates of radius R. The plates are separated by a distance of 1.7 mm.
(a) What radius must the plates have if the capacitance of this capacitor is to be 1.8 µF?
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(b) If the separation between the plates is decreased, should the radius of the plates be increased or decreased to maintain a capacitance of 1.8 µF?
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Explain.
(c) Find the radius of the plates that gives a capacitance of 1.8 µF for a plate separation of 3.0 mm.
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