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What is potential energy of a dipole ? |
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Answer» Solution :The work done in rotating a DIPOLE in the magenatic field is STORED into as potential energy 1 U= MH `[cos theta_1- cos theta_2]` when MAGNET rotates from `thita_1` to `thita _2` against a torque. Let `theta _1=90^@` and `theta_2=theta` Then U = - MH cos Q = - `vec M vec H` For `theta = 0^@`, U= + MH (minimum) For `theta = 90^@`,U = 0 `theta = 180^@`, U = - MH (maximum) |
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