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Physics
Classical Physics
Electromagnetism
A donut electromagnetic core comprises main section + movable section
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[QUOTE="artis, post: 6851818, member: 652341"] [USER=637633]@cairoliu[/USER] I believe what your asking in the first post of this thread is "do magnetic field lines move together with a perfectly symmetrical magnet that is rotated around it's axis of symmetry and that is also polarized along the same axis of symmetry. The answer is NO! Magnetic field lines are a human made construct to help aide thinking, their not real, there is just a physical phenomenon called magnetic field. Magnetic field doesn't move, it only has a quantity named "field strength" and this quantity changes if you change your distance to the field source. If you are at a static non changing distance from a round disc magnet that is axially magnetized and that rotates around it's symmetry axis of polarization then you won't notice a single thing, the field won't change. There are no hairy field lines sticking out of the magnet disc surface that are dragged along as the magnet moves as if they were human hair dragged along the wind, no such thing exists.So if you take a magnetic core like you showed and insert a cylindrical and symmetric part in it and keep it perfectly steady radially but just spin it axially and the spinning material has an almost perfect structural isotropy then the "field lines" won't be altered in any way I think, the field in the core won't "notice" so to speak. [/QUOTE]
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Physics
Classical Physics
Electromagnetism
A donut electromagnetic core comprises main section + movable section
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