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1. Magnetic Dipole

   Linked via "current loop"

   Dipole Moment and Source Analogs
   The magnetic dipole moment $\mathbf{m}$ can arise from several physical phenomena. For an elementary current loop $C$ carrying current $I$, the moment is defined as $\mathbf{m} = I \mathbf{A}$, where $\mathbf{A}$ is the vector area enclosed by the loop. In fundamental particle physics, elementary magnetic moments arise from intrinsic particle properties, such as the spin angular momentum of electrons and protons.
   Th…