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MannyP2011
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Can magnetism exist independently of current or charge?
I'm just curious because the intertwining relationship between E&M.
I'm just curious because the intertwining relationship between E&M.
MannyP2011 said:I asked my professor( he has a PhD in Particle Physics) and he said magnetism can exist independently of charges but he didn't explain why during a E&M class.
I ask this because I wonder why the speculation of magnetic monopoles if magnetism is just an effect of moving charges and there are only certain ways that charges can move through space and obviously if all of the possibilities of motion must have to been exhausted since the nobel prize in the waiting if they where found.
Why do people still speculate about magnetic monopoles existing?
Phrak said:A perm. magnet can have a magnetic field without charge or current.
Ferromagnetism is caused by the electron's magnetic moment, not its charge.Vanadium 50 said:The magnetization arises from the electrons in the atom. If you got rid of electric charge you would also get rid of this permanent magnetization.
I don't dispute that people can write down a theory other than Classical Electrodynamics that permits different solutions (although I didn't follow yours). But that's not the focus of a forum called "Classical Physics".
Vanadium 50 said:If an electron were neutral, it would have no magnetic moment.
Vanadium 50 said:If an electron were neutral, it would have no magnetic moment.
Vanadium 50 said:If an electron were neutral, it would have no magnetic moment.
Phrak said:Well, maybe. A neutron has a magnetic moment. You could counter by saying that a neutron is composed of charged quarks, but this goes far afield into unknow territory. How much is orbital magnetic moment and how much is intrinsic--who knows
MannyP2011 said:I asked my professor( he has a PhD in Particle Physics) and he said magnetism can exist independently of charges but he didn't explain why during a E&M class.
I ask this because I wonder why the speculation of magnetic monopoles if magnetism is just an effect of moving charges and there are only certain ways that charges can move through space and obviously if all of the possibilities of motion must have to been exhausted since the nobel prize in the waiting if they where found.
Why do people still speculate about magnetic monopoles existing?
Vanadium 50 said:I don't understand your comment about the W; it has charge, it has a magnetic moment and it even has an electric quadrupole moment.
Rayquesto said:I believe that Magnetism can exist independent from current because a current is formed from aligning magnetic fields which we call "magnetic Domains." Magnetism still exists, but the elctrons are all over the place. I don't know about chrage though because chrage still exists in magnetism regardless of unaligned magnetic fields.
Rayquesto said:I believe that Magnetism can exist independent from current because a current is formed from aligning magnetic fields which we call "magnetic Domains." Magnetism still exists, but the elctrons are all over the place. I don't know about chrage though because chrage still exists in magnetism regardless of unaligned magnetic fields.
Well, maybe. A neutron has a magnetic moment. You could counter by saying that a neutron is composed of charged quarks, but this goes far afield into unknow territory. How much is orbital magnetic moment and how much is intrinsic--who knows?
How do you define a moving magnetic field? A moving current?
The magnetism of electron mass particle, support idea that this particle is structured by two electric charge that move toward each other. It is not enough to have electric charge. neNeeded the moviment of this charge to create magnetism. This is the opinion of a layman
Drakkith said:Magnetism cannot exist without charge. Period. Current is a flow of charges, usually electrons in a conductor. A stationary charge, in relation to an observer, is NOT creating a magnetic field EXCEPT through its intrinsic spin. In an atom the electrons are in orbitals around the nucleus, which means that the electrons are moving and thus create an additional magnetic field from that movement. The alignment of these in a permanent magnet is the source of it's magnetism.
Well, Drakkith, what is your insight as to how something contains magnetism yet doesn't contain a current or charge? I mean, if a current doesn't exist, doesn't that mean that magnetic domains don't exist, partially due to the right hand rule and the nature of directions of current and magnetic field? like the direction of the magnetic field is perpendicular to the current it produces.
Well, Drakkith, what is your insight as to how something contains magnetism yet doesn't contain a current or charge?
I mean, if a current doesn't exist, doesn't that mean that magnetic domains don't exist, partially due to the right hand rule and the nature of directions of current and magnetic field? like the direction of the magnetic field is perpendicular to the current it produces.
A magnetic field is a field of force produced by moving electric charges, by electric fields that vary in time, and by the 'intrinsic' magnetic field of elementary particles associated with the spin of the particle.
Drakkith said:What do you mean? I specifically said magnetism cannot exist WITHOUT charge.
Then what is the original guy still curious about? Like How can you answer the original question that this "host" asked?
Rayquesto said:Drakkith said:What do you mean? I specifically said magnetism cannot exist WITHOUT charge.
Then what is the original guy still curious about? Like How can you answer the original question that this "host" asked?
Are magnetic domains caused by magnetic moment of intrinsic spin? As I think charges are not "moving" in the normal sense, according to Orbital theories. What about the Bohr's magnetons?
If the string theory is true to some extent, there should be a way to generate an intrinsic property that makes the magnetic monopoles true. Or maybe the configuration of our environment is not sufficient for their to be a monopole? Probably somewhere in space the configuration can show the presence of monopoles
Drakkith said:Partly. It is both the magnetic moment of the particle and the movement in it's orbital I believe.