Лаг1989 задача №14.41

Potential difference between the plates of a spherical air condenser U = 3000V. What kinetic energy will the electron acquire, approaching the center of the spherical surfaces from a distance r1 = 3cm to a distance r2 = 2cm, if the radii of the plates are R1 = 1cm and R2 = 4cm, respectively.

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