Задача 30835.

A flat capacitor is charged to a potential difference of 300 V and disconnected from the source. The distance between the plates is 5 mm, their area is 300 cm^2. Determine the charge and energy of the capacitor if, when the dielectric is removed from the capacitor, its energy increases 8 times.

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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