Does a magnetic field rotate with a magnet...the answer!
in [Physics]
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From: Vince Morgan on 28 Feb 2010 20:13 "Benj" <bjacoby(a)iwaynet.net> wrote in message news:3b0dfe4e-1b94-4e1d-821b-5e54b464f360(a)j27g2000yqn.googlegroups.com... On Feb 25, 5:03 am, "Cwatters" <colin.wattersNOS...(a)TurnersOakNOSPAM.plus.com> wrote: > "Benj" <bjac...(a)iwaynet.net> wrote in message > >>Any more questions? > > but it also depends on the volume not the surface area. [quote] So? Where is the "current" flowing in a magnet? Obviously around each atom/molecule. The fact that such currents APPEAR to act as a current flowing on the surface of the magnet due to cancellations does not change the fact that the action is really throughout the body of the magnetic material. No? [/unquote] I think I get it. Assuming an idealized permanent magnet where all electron orbits are aligned. Internaly they cancel due to the fact that on one side of a nucleus electrons are travelling in the opposite direction to the other side. However at the boundry between the material and air, or whatever, the situation is quite different. In this case we see that all electrons popping above the surface are travelling in the SAME direction. Thus to an observer at the micro level, a current would be running sporadically and unidirectionally accross the surface of the material? Am I on the right track? Regards, Vince
From: Vince Morgan on 28 Feb 2010 21:12 "Androcles" <Headmaster(a)Hogwarts.physics_u> wrote in message news:FbIhn.69073$kS2.43917(a)newsfe17.ams2... > > "Benj" <bjacoby(a)iwaynet.net> wrote in message > news:3b0dfe4e-1b94-4e1d-821b-5e54b464f360(a)j27g2000yqn.googlegroups.com... > On Feb 25, 5:03 am, "Cwatters" > <colin.wattersNOS...(a)TurnersOakNOSPAM.plus.com> wrote: > > "Benj" <bjac...(a)iwaynet.net> wrote in message > > > >>Any more questions? > > > > but it also depends on the volume not the surface area. > > So? Where is the "current" flowing in a magnet? > =========================================== > It's called a flux. It picks up iron filings. > > Furthermore, assuming it is true, it would seem that what we think of as a magnetic field is a field of lorenze interactions between moving charges? Regards, Vince
From: Vince Morgan on 28 Feb 2010 21:16 "Benj" <bjacoby(a)iwaynet.net> wrote in message news:3b0dfe4e-1b94-4e1d-821b-5e54b464f360(a)j27g2000yqn.googlegroups.com... On Feb 25, 5:03 am, "Cwatters" <colin.wattersNOS...(a)TurnersOakNOSPAM.plus.com> wrote: > "Benj" <bjac...(a)iwaynet.net> wrote in message > >>Any more questions? > Sorry, wrong node first time. Furthermore, assuming it is true, it would seem that what we think of as a magnetic field is a field of lorenze interactions between moving charges? Regards, Vince
From: Salmon Egg on 28 Feb 2010 22:28 In article <4b8b13ce$0$1783$afc38c87(a)news.optusnet.com.au>, "Vince Morgan" <vinhar(a)TAKEOUToptusnet.com.au> wrote: > Internaly they cancel due to the fact that on one side of a nucleus > electrons are travelling in the opposite direction to the other side. > However at the boundry between the material and air, or whatever, the > situation is quite different. In this case we see that all electrons > popping above the surface are travelling in the SAME direction. Thus to an > observer at the micro level, a current would be running sporadically and > unidirectionally accross the surface of the material? > Am I on the right track? > Regards, Yes but... If you have a solenoid carrying current, there is only current on the surface--the winding itself. If you stick an iron core inside the solenoid, the whole cross section of the core gets magnetized. Somehow, I think, posters here are imputing some magical properties to these surface currents. I want to know what these properties are. Bill -- An old man would be better off never having been born.
From: BURT on 28 Feb 2010 22:49
On Feb 28, 7:28 pm, Salmon Egg <Salmon...(a)sbcglobal.net> wrote: > In article <4b8b13ce$0$1783$afc38...(a)news.optusnet.com.au>, > "Vince Morgan" <vin...(a)TAKEOUToptusnet.com.au> wrote: > > > Internaly they cancel due to the fact that on one side of a nucleus > > electrons are travelling in the opposite direction to the other side. > > However at the boundry between the material and air, or whatever, the > > situation is quite different. In this case we see that all electrons > > popping above the surface are travelling in the SAME direction. Thus to an > > observer at the micro level, a current would be running sporadically and > > unidirectionally accross the surface of the material? > > Am I on the right track? > > Regards, > > Yes but... > > If you have a solenoid carrying current, there is only current on the > surface--the winding itself. If you stick an iron core inside the > solenoid, the whole cross section of the core gets magnetized. Somehow, > I think, posters here are imputing some magical properties to these > surface currents. I want to know what these properties are. > > Bill > > -- > An old man would be better off never having been born. Turn some magnets and see what happens. Mitch Raemsch |