If a certain capacitor consists of two metal plates in air placed parallel and close to each other but not touching. The capacitor is connected briefly to a dc generator so that the difference in potential between the two plates becomes 12,000V. The capacitance of the capacitor is 1 × 10−6 microfarad. How much energy, in joules is stored on the plates?

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If a certain capacitor consists of two metal plates in air placed parallel and close to each other but not touching. The capacitor is connected briefly to a dc generator so that the difference in potential between the two plates becomes 12,000V. The capacitance of the capacitor is 1 × 10−6 microfarad. How much energy, in joules is stored on the plates?