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User 151.20.154.132 derived e.m.f. without the use of vector A, thinking in this way that is possible to get rid of it. But the fact that B is null (with good aproximation) where the e.m.f. is recored remains. So who generates the e.m.f. in that point of space? There, just A is not null and propagation of B is neglectable (stationary state).
Vilnius ( talk) 09:19, 3 November 2019 (UTC)
Saying "the magnetic field is practically static inside" seems misleading since the rate of change of the magnetic field (likewise rate of change of vector potential) is absolutely the point of focus here. In fact we might decide to take a snapshot at the instant in time when the current passes right through zero (and so vector potential and magnetic field are zero everywhere, for an instant), and we would see the nonzero induced electric field even at this time instant when the relative change in magnetic field is so large. -- Nanite ( talk) 01:32, 4 February 2021 (UTC)
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||
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User 151.20.154.132 derived e.m.f. without the use of vector A, thinking in this way that is possible to get rid of it. But the fact that B is null (with good aproximation) where the e.m.f. is recored remains. So who generates the e.m.f. in that point of space? There, just A is not null and propagation of B is neglectable (stationary state).
Vilnius ( talk) 09:19, 3 November 2019 (UTC)
Saying "the magnetic field is practically static inside" seems misleading since the rate of change of the magnetic field (likewise rate of change of vector potential) is absolutely the point of focus here. In fact we might decide to take a snapshot at the instant in time when the current passes right through zero (and so vector potential and magnetic field are zero everywhere, for an instant), and we would see the nonzero induced electric field even at this time instant when the relative change in magnetic field is so large. -- Nanite ( talk) 01:32, 4 February 2021 (UTC)