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  4. A current carrying loop is placed in a uniform magnetic field in four different orientations ; I,II,III and IV, arrange them in the decreasing order of potential energy: <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-whi2m6jfqqscafx3.jpg />

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Q. A current carrying loop is placed in a uniform magnetic field in four different orientations ; $I,II,III$ and $IV,$ arrange them in the decreasing order of potential energy:
Question

NTA AbhyasNTA Abhyas 2020

Solution:

$U=-\overset{ \rightarrow }{M}\cdot \overset{ \rightarrow }{B}=-MBcos\theta $