Задача 40174.

The oscillating circuit includes a coil with an inductance of 5 mH and a flat capacitor with a glass dielectric. The distance between the capacitor plates is 6 mm, the plate area is 90 cm ^ 2. How much will the frequency and period of oscillation of the circuit change if the glass layer of the capacitor is noticeable to be air? ε1 = 7; ε2 = 1.

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