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A parallel plate capacitor of capacitance Co has plates of area A with separation d between...

A parallel plate capacitor of capacitance Co has plates of area A with separation d between them. When it is connected to a battery of voltage Vo, it has charge of magnitude Qo on its plates. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging them. After the plates are 2d apart, by what factor does the magnitude of the charge on the plates change? By what factor does the potential difference between the plates change?

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