Задача 30650.

A flat air capacitor was charged to a potential difference of 200 V, then the capacitor was disconnected from the current source. What will be the potential difference between the plates if the distance between them is increased from 0.2 to 0.7 mm, and the space between them is filled with mica (e = 7)?

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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