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Feb6-13, 07:02 AM
P: 17,556
Quote Quote by A Dhingra View Post
If a test charge,q i.e. Q>>q, is placed in this region, then due to repulsion it will move away from the charge Q. It will continue this motion till it is at infinite distance. This suggests that the total energy gained by the charge q from Q is infinite
This is incorrect. Simply because the distance is infinite does not imply that the energy is infinite.

What is the general expression for work? What does the energy depend on besides the distance? What happens if this other quantity goes to 0 and is that the situation here?