A current carrying loop is placed in a uniform magnetic field in four different orientations, $I$, $II$, $III$ & $IV$ arrange them in the decreasing order of potential Energy
A$I > III > II > IV$
B$I > II >III > IV$
C$I > IV > II > III$
D$III > IV > I > II$
IIT 2003, Medium
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C$I > IV > II > III$
c (c) $U = - MB\cos \theta $; where $\theta = $ Angle between normal to the plane of the coil and direction of magnetic field.
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