A current loop in a magnetic field

A current loop in a magnetic field
  1. experiences a torque whether the field is uniform or non-uniform in all orientations
  2. can be in equilibrium in one orientations
  3. can be equilibrium in wo orientations, both the equilibrium states are unstable
  4. can be in equilibrium in two orientations, one stable while the other is unstable

Solution

For parallel $\mathbf{M}$ is stable and for antiparallel is unstable.

Asked in: NEET 2013 (All India)

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