7. Two opposite charges Q1 = 5 ∙ 10−6 C and Q2 = 2.8 ∙ 10−6 C are in water at a distance of r = 0.5 m from each other. Determine the field strength at a point located in the middle between these charges.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)