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A power station needs to store 10kJ of energy. What area parallel-plate capacitor would be required if strontium titanate is used as dielectric and the

A power station needs to store 10kJ of energy. What area parallel-plate capacitor would be required if strontium titanate is used as dielectric and the plate separation is 1×10−6m1×10−6m? The maximum voltage allowed is 1.0kV.

The correct answer is 9.7 m^2, but I have no idea how they got that. Please explain each step. Thanks so much.

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