45. An electron moving at a speed of υox = 4.5 Mm / s flies into the space between two plates at an equal distance from them. The length of the capacitor plates is l = 7 cm; the distance between the plates is d = 2 cm. The voltage U = 6 V is applied to the capacitor. How much will the electron speed increase when it leaves the capacitor compared to the initial one?

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)