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A physicist builds a parallel-plate capacitor with adjustable spacing between the plates. When the plates are...

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Physics

A physicist builds a parallel-plate capacitor with adjustablespacing between the plates. When the plates are at their initialseparation, the capacitance is 7.00 µF.

(a) At this capacitance, the capacitor is connected to a 18.00 Vbattery. After fully charging, how much energy (in µJ) is stored inthe capacitor?

(b) The battery is then disconnected. Without discharging thecapacitor, the physicist then doubles the separation between theplates. At this point, how much energy (in µJ) is stored in thecapacitor?

(c) Without changing this new separation between the plates, thecapacitor is discharged, and then reconnected to the 18.00 Vbattery. Now, after fully charging, how much energy (in µJ) isstored in the capacitor?

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