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# Three identical dipoles with charges q and –q and separation a between the charges are placed on the corners of an equilateral $\Delta$ of side d as shown in figure. Find the interaction energy of the system (a << d).

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## 1 Answer

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$(A)\;\large\frac{3 q^2a^2}{4 \pi \in_0 d^3}$
Hence A is the correct answer.
answered Jun 11, 2014 by