86. The point charges Q1 = 1 μC and Q2 = −1 μC are at a distance d = 10 cm from each other. Determine the field strength at a point remote at r1 = 6 cm from the first and r2 = 8 cm from the second charge. Determine the force acting at this point on a point charge q = 0.1 μC.

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