Решение задачи по физике раздел 38 пункт 19 электро

19. The sphere of radius 9 cm is charged to a potential of 25 kV. At a distance of 50 cm from the surface of the ball is a point charge 10-8 Cl. What kind of work you need to do to reconcile the ball and charge up to a distance of 20 cm?

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