I am looking for an equation that gives me the potential energy of the interaction between two parallel dipoles.

  • $\begingroup$ This is pretty much formula based. Find the field due to one dipole near the other, then use $U=-\vec p \cdot \vec E$ $\endgroup$ – udiboy1209 Jul 24 '13 at 11:15
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    $\begingroup$ I think, according to homework policy, this question is off-topic. $\endgroup$ – Mostafa Jul 24 '13 at 11:18


Interaction energy of two dipoles :

$$U=\frac{1}{4\pi \epsilon_0r^3}\left( \mathbf{p}_1.\mathbf{p}_2-3\left ( \mathbf{p}_1.\hat r )(\mathbf{p}_2.\hat r\right) \right)$$

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    $\begingroup$ Could you explain what is the meaning of $\hat r$? $\endgroup$ – user1420303 Nov 14 '18 at 14:28

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