A current loop in a magnetic field

can be in equilibrium in one orientation
can be in equilibrium in two orientations, both the equilibrium states are unstable
can be in equilibrium in two orientations, one stable while the other is unstable
experiences a torque whether the field is uniform or non-uniform in all orientations

Correct answer: can be in equilibrium in two orientations, one stable while the other is unstable

Solution

A current loop in a magnetic field can achieve equilibrium in two orientations: one where the magnetic moment aligns with the field (stable equilibrium) and another where it is anti-aligned (unstable equilibrium).

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