The solution of the problem 2.18 cr 2 from the problem

The solution of the problem 2.18 cr 2 from the problem

Task 2.18
At a speed of 2 • 107 m / s, the electron flies into the space between the plates of the flat capacitor in
Middle of the gap in the direction parallel to the plates. At what minimum potential difference
On the plates, the electron does not fly out of 1 capacitor, if the length of the capacitor is 10 cm, and the distance between
Its lining is 1 cm?