A 1.2microf capacitor is charged to a potential difference, Ask an Expert

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Q1. A 1.2µF capacitor is charged to a potential difference of 11.0V. The wires connecting the capacitor to the battery are next disconnected from the battery and connected across a second, initially uncharged, capacitor. The potential difference across the 1.20 µF capacitor then drops to 3 V.

What is the capacitance of second capacitor?

Q2. A commercial solar cell puts out the maximum 5 volts and 0.1 Amps and measures 5 by 8cm. How large an array is needed for the maximum output of 40 watts?

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