Three charges +3Q,+2Q and −Q respectively are located at a distance – InterviewSolution

1.	Three charges +3Q,+2Q and −Q respectively are located at a distance "a" from the origin as shown in the figure. (k=14πϵ0). A fourth charge +3Q is slowly moved in from inifinite to the point O. The work done by an external agent in this process is
Answer» Three charges $+ 3 Q, + 2 Q$ and $- Q$ respectively are located at a distance $" a "$ from the origin as shown in the figure. $(k = \frac{1}{4 π ϵ_{0}})$ . A fourth charge $+ 3 Q$ is slowly moved in from inifinite to the point O. The work done by an external agent in this process is

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