Задача 30473.

A flat capacitor with a plate area S = 100 cm ^ 2 each, charged to a potential difference U = 3 kV. The distance between the plates is d = 4 cm. The dielectric is glass. Determine the field energy W of the capacitor and the field energy density.

Detailed solution with a short recording of the conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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