92. Find the volumetric energy density of the electric field at a point 2 cm from the surface of a charged ball with a radius of 1 cm. The surface charge density on the ball is 5 ∙ 10−6 C / m2, the dielectric constant of the medium is ε = 2. Calculate the capacity and the total ball energy.

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