A parallel plate capacitor of capacitance C, has plates of area A with separation d between them. When it is connected to a battery of voltage V, it has charge of magnitude Q, on its plates. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging ther After the plates are 2d apart, the magnitude of the charge on the plates and the potential difference betwveen them are:
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