27. An equally charged ball with a mass of 0.5 g and a charge of 0.10 nC is suspended from an infinite uniformly charged vertical plane with a surface charge density of 30 μC / m2. At equilibrium, what is the tension force of the thread in mN and what is the angle between the plane and the thread?

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