An electric dipole is fixed at the origin of coordinates. Its moment is directed in the positive x-direction. A positive charge is moved from the point (r, 0) to the point (–r, 0) by an external agent. In this process, the work done by the agent is –
Text Solution
Verified by ExpertsThe correct answer is:
D
The potential due to the dipole is positive at
A(r, 0) and negative at B(–r, 0). Also this potential is inversely proportional to r 2 . Work is done by agent is also inversely proportional to r 2 
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