71. An electron, having traveled in a flat capacitor from one plate to another, acquires a velocity of 108 cm / s. The distance between the plates is 5.3 mm. Find: 1) the potential difference between the plates; 2) the electric field strength of the capacitor; 3) surface charge density on the plates.

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