Physics · Magnetism and Matter

A current-carrying loop with magnetic dipole moment M is placed in a uniform magnetic field B in four different orientations. In Orientation I, the angle θ between M and B is 180°. In Orientation II, θ = 90°. In Orientation III, θ is acute (e.g., 45°). In Orientation IV, θ = 0°. Arrange these orientations in decreasing order of their potential energy.