A uniform magnetic field B of 0.3 T is along the positive Z-direction. A rectangular loop (abcd) of sides 10 cm xx 5 cm carries a current I of 12 A. Out of the following different orientations which one corresponds to stable equilibrium?

A uniform magnetic field B of 0.3 T is along the positive Z-direction.

1.	A uniform magnetic field B of 0.3 T is along the positive Z-direction. A rectangular loop (abcd) of sides 10 cm xx 5 cm carries a current I of 12 A. Out of the following different orientations which one corresponds to stable equilibrium?
Answer» Solution :Magnetic potential energy of the dipole in a magnetic field,`U=-vecMvecB` As M and B are same in each CASE (in MAGNITUDE) for STABLE equilibrium, potential energy should be minimum. Minimum potential energy is possible if`vecM` and `VECB` are in same direction. So option (d) is correct.

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A uniform magnetic field B of 0.3 T is along the positive Z-direction. A rectangular loop (abcd) of sides 10 cm xx 5 cm carries a current I of 12 A. Out of the following different orientations which one corresponds to stable equilibrium?

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