Hi
It is said that air has low magnetic permeability because it has low mass density and the atoms are mobile. Similarly, when we keep on increasing DC current in a coil wound around a ferromagnetic core, then there will come a time when the increase in current won't result in any change in flux - the core is saturated with flux at this point and almost all the atoms in the core are aligned. From these points we conclude that magnetic field has to do something with the atoms in a material. Correct? Then, what causes magnetic field in space? The space (or, vacuum) has magnetic permeability which means it should be capable of generating whatever little amount of flux. Am I interpreting it incorrectly? Please help me with it. Thank you.
Regards
PG
It is said that air has low magnetic permeability because it has low mass density and the atoms are mobile. Similarly, when we keep on increasing DC current in a coil wound around a ferromagnetic core, then there will come a time when the increase in current won't result in any change in flux - the core is saturated with flux at this point and almost all the atoms in the core are aligned. From these points we conclude that magnetic field has to do something with the atoms in a material. Correct? Then, what causes magnetic field in space? The space (or, vacuum) has magnetic permeability which means it should be capable of generating whatever little amount of flux. Am I interpreting it incorrectly? Please help me with it. Thank you.
Regards
PG
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