Talk:Magnetic field
Making sure we are on same page with removal of 'In engineering' section from article: Reply
| ← Previous revision | Revision as of 18:41, 24 April 2026 | ||
| Line 109: | Line 109: | ||
:::The article is about the magnetic field. We don't need to clutter it up with tangents about how it is taught. It is enough to say that some sources prefer B and some prefer H. In vacuum, the only difference is the units. What is true for H is true for B. |
:::The article is about the magnetic field. We don't need to clutter it up with tangents about how it is taught. It is enough to say that some sources prefer B and some prefer H. In vacuum, the only difference is the units. What is true for H is true for B. |
||
:::Inside magnetic materials, particularly ferromagnetic materials, the situation is so complex that suggesting any kind of linear relationship between H and B is essentially a [[lie to children]]. My recollection is that even the Feynman lectures avoided going there. [[User:Constant314|''Constant314'']] ([[User talk:Constant314|talk]]) 01:35, 24 April 2026 (UTC) |
:::Inside magnetic materials, particularly ferromagnetic materials, the situation is so complex that suggesting any kind of linear relationship between H and B is essentially a [[lie to children]]. My recollection is that even the Feynman lectures avoided going there. [[User:Constant314|''Constant314'']] ([[User talk:Constant314|talk]]) 01:35, 24 April 2026 (UTC) |
||
::::I already agreed about removing the section; although I am a little surprised by the intensity of the hate for the section. |
|||
::::Is the non-linearity of the permeability that bad of an assumption for practical situations? I view it the same way as I view Ohm's law (although a little less reliable). We don't ignore ohm's law because of all the non-ohmic material out there including many important non-ohmic devices. |
|||
::::As a physicist, I have had to deal with both anisotropy of the permeability in crystals and with inhomogenous samples (such as a small plate in a larger uniform magnetic field), but I wouldn't want to spend too much space, if any, in this article covering those fairly common situations. Is non-linearity that much different that we should reduce the significance of B = mu H in this article? [[User:TStein|TStein]] ([[User talk:TStein|talk]]) 18:41, 24 April 2026 (UTC) |
|||
