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Is it possible to have a magnetic field of a any geometry we want, or there are only few types of geometries that can be achieved with permanent magnets and electromagnets? If the former, how do we produce a magnetic field of specific geometry? For example, can the magnetic field be cylindrical or can it be swirl? If the latter, can I see what are the available geometries of all the possible magnetic fields?

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  • $\begingroup$ Do you mean theoretically or in practice? $\endgroup$ – user1583209 Aug 17 '17 at 10:42
  • $\begingroup$ Not theoretically, but in practice $\endgroup$ – ergon Aug 21 '17 at 9:22

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