Another visualization of the behaviour of magnetic fields without the concept of lines of force. When the magnet is moved around it simply changes the orientation of all the little compass needles. The notion of lines of force tends to make one think the magnetic field is somehow mechanically attached to the magnet so that the centre point of each needle must change position in order to match the motion of the magnetic.
https://www.youtube.com/shorts/HTylDaG5_RY Harry On Wed, Mar 6, 2024 at 11:16 AM H L V <hveeder...@gmail.com> wrote: > > > Here is a physical demonstration of the situation using a ferrofluid. > https://www.youtube.com/watch?v=Bn41nPOGq-U > The ferrofluid does not rotate with the cylindrical magnet, which supports > the idea that the magnet's field does not rotate with the magnet. > (There is a little bit of movement but the narrator explains that this > movement arises from the field not being perfectly symmetrically.and > homogeneous). > > Harry > > On Wed, Mar 6, 2024 at 12:40 AM H L V <hveeder...@gmail.com> wrote: > >> It depends what you mean by a field. If you imagine the field is made of >> wire-like filaments which are fastened to an atom then you would expect the >> field to translate and rotate whenever the atom translates and rotates. On >> the other hand if you imagine the field is a vector field then the field >> never really needs to move. Instead the direction of the magnitude of the >> vector at each point in space updates as the atom moves through that vector >> space. The way the vector field changes as the atom rotates and translates >> gives the appearance of a field that is moving as if it were fastened to >> the atom. >> >> Harry >> >> >> On Tue, Mar 5, 2024 at 1:41 PM Robin <mixent...@aussiebroadband.com.au> >> wrote: >> >>> In reply to H L V's message of Tue, 5 Mar 2024 09:28:31 -0500: >>> Hi, >>> >>> You don't need an experiment to figure this out. The field obviously >>> rotates with the magnet. >>> This is because the field is not a single entity. It is the sum of all >>> the tiny fields created by the electrons attached >>> to individual atoms, so when the magnet rotates, the atoms all move, >>> taking their individual fields with them. We know >>> they do this because when the magnet is moved sideways, instead of >>> rotating, the field moves sideways as well. IOW, the >>> atomic fields are attached to their individual atoms. There is no reason >>> this should change when rotation is involved >>> rather than translation. >>> >>> [snip] >>> >Resolving the paradox of unipolar induction: new experimental evidence >>> on >>> >the influence of the test circuit (Free to download. Published 2022) >>> >https://www.nature.com/articles/s41598-022-21155-x >>> Regards, >>> >>> Robin van Spaandonk >>> >>> Drive your electric car every second day and recharge it from solar >>> panels on your roof on the alternate days. >>> The other days, drive your spouses car, and do the same with it. >>> >>>
