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What should be the orientation of a magnetic dipole in a uniform magnetic field so that its potential energy is maximum? |
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Answer» Potential energy of a magnetic dipole in a uniform magnetic field U = – MB cos q; clearly the potential energy is maximum when cos θ = – 1 or θ = π That is, potential energy is maximum when magnetic dipole with its magnetic moment \(\underset{M} \rightarrow\) is oriented opposite to the direction of magnetic field (or angle between \(\underset{M} \rightarrow\) and \(\underset{B} \rightarrow\) is 180°). |
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