How can DC-magnetic fields be produced with the aid of currents? What's a possible theoretical explanation for this, and how does one achieve this in the real world? What are the maximum fields that could be produced this way?
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1$\begingroup$ What is a DC-magnetic field? Do you mean How can magnetic fields be produced with the aid of DC currents? $\endgroup$– John RennieCommented Mar 14, 2015 at 10:45
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$\begingroup$ I mean uni-directional magnetic fields: engineering.com/Ask@/qactid/7/qaqid/5576.aspx $\endgroup$– KamilCommented Mar 14, 2015 at 11:00
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1 Answer
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Any conductor carrying DC current produces a unidirectional magnetic field. A brief explanation of the phenomenon is given here: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html
answered Mar 14, 2015 at 11:14
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$\begingroup$ Do the orbiting electrons in a magnetic material cause infinitesimal magnetic fields, due to their orbiting the nucleus? $\endgroup$– KamilCommented Mar 14, 2015 at 11:38
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$\begingroup$ @Kamil: Electrons don't orbit the nuclei in atoms, however they do have a spin and in most cases an orbital angular momentum. In ferromagnets the macroscopic magnetic field is due to unpaired electrons spins. $\endgroup$ Commented Mar 14, 2015 at 12:21