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Two capacitors of capacitances 1.1 μF and 4.7 μF are each charged separately by being connected...

Two capacitors of capacitances 1.1 μF and 4.7 μF are each charged separately by being connected across a 7.8 V battery. After being fully charged, they are disconnected from the battery and then connected to each other using wires so that the plates of opposite charges are connected together. What will be the magnitude of the final voltage (in V) across the 4.7 μF capacitor?

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