53. The charge q1 = 24 nC is evenly distributed over a thin ring of radius r = 6 cm. What is the field strength at a point located on the axis of the ring at a distance of a = 18 cm from the center of the ring? Find also the force acting at this point on the point charge q2 = 0.5 nC.

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