(b) How much work is required to separate the two charges infinitely
away from each other Rationalised 2023-24
Physics
60
 EXAMPLE 2 5
(c) Suppose that the same system of charges is now placed in an
external electric field E = A (1/r 2); A = 9 × 105 NC–1 m2 What would
the electrostatic energy of the configuration be