A parallel-plate capacitor has plates of area A and separation d and is charged to a potential difference V. The charging battery is then disconnected, and the plates are pulled apart until their separation is 3d. Derive expressions in terms of A, d, and V for a) the new potential difference; b) the initial and final stored energies, Ui and Uf; and c) the work required to separate the plates.
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A parallel-plate capacitor has plates of area A and separation d and is charged to a potential difference V. The charging battery is then disconnected, and the plates are pulled apart until their separation is 3d. Derive expressions in terms of A, d, and V for a) the new potential difference; b) the initial and final stored energies, Ui and Uf; and c) the work required to separate the plates.
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