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Ex: A 30-µF capacitor is charged to 80 V for a long time and removed from...

Ex: A 30-µF capacitor is charged to 80 V for a long time and removed from the battery. The charged capacitor then connected across an initially uncharged capacitor of unknown capacitance C. If the final potential difference across the 30-µF capacitor is 20 V, determine C.

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