Задача id10489

The glass plate completely fills the gap between the plates of a flat capacitor, the capacitance of which in the absence of the plate is 2 μF. The capacitor was charged from a voltage source with an EMF of 1000 V, and then disconnected from the source. Find the mechanical work that must be done against the electrical forces to remove the plate from the capacitor. Dielectric constant 2.

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