Question

The potential energy of a bar magnet of magnetic moment $M$ placed in a magnetic field of magnitude $B$ such that it makes an angle $\theta$ with the direction of $B$ is:

• A. $MB\sin \theta$
• B. $-MB\cos \theta$
• C. $MB(1-\cos \theta )$
• D. $MB(1+\cos \theta )$

Answer 1

The correct option is B $-MB\cos \theta$

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