88. Spherical capacitor has inner and outer radii of the shells R1 = 2,0 cm and R2 = 5,0 cm, respectively. Between the sheath potential difference U = 2,0 kV. Find strength E of the electric field at a distance r = 3,0 cm from the center of the shells.

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