Question:

Example 8.13: a) Determine the electrostatic potential energy of a system consisting of two charges -2 µC and +4 µC (with no external field) placed at (-8 cm, 0, 0) and (+8 cm, 0, 0) respectively. b) Suppose the same system of charges is now placed in an external electric field E = A (1/r²), where A = 8 × 10cm², what would be the electrostatic potential energy of the configuration