87. The cylindrical capacitor is charged to a potential difference U = 2,0 kV. Cylinder radii r1 = 3,0 cm and r2 = 1,5 cm. What speed υ acquire an electron moving in an electric field at a distance l1 = 2,0 cm and the distance l2 = 2,5 cm from the axis of the cylinder?

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