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Potential energy is the energy of a body or a system due to the position of the body or the arrangement of the particles of the system.
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Work done by magnetic field on magnetic dipole
First, we define the direction of $\vec{\theta}$ between $\vec{\mu}$ and $\vec{B}$ to be positive if $\vec{\theta}$ is coming out of the screen in the sense that $\theta$ is increasing with the right- …
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Work done by magnetic field on magnetic dipole
In the above slide, it reads that $W=\int\mu B sin(\theta)d\theta=\mu B cos(\theta)$.
But, I thought that $\int\mu B sin(\theta)d\theta=-\mu B cos(\theta)$ by some calculus calculation.
Can somebo …