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yyouth24
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Why does moving electron produce magnetic field around it? Thank you.
yyouth24 said:Why does moving electron produce magnetic field around it? Thank you.
LostConjugate said:A moving electron alone actually does not produce a magnetic field.
jtbell said:
jtbell said:
jtbell said:
http://farside.ph.utexas.edu/teachin...s/node125.html
A magnetic charge/current, if they existed, would favor magnetic fields over electric fields.
Bill_K said:When you view it from a moving rest frame, the E field becomes partly a B field.
LostConjugate said:"Becomes"? I don't see where this part is derived.
The only relativistic derivation of the magnetic field I have ever seen was dependent on a positive charge as part of the system.
Einstein derived it in his original OEMB paper.LostConjugate said:"Becomes"? I don't see where this part is derived.
§ 6. Transformation of the Maxwell-Hertz
Equations for Empty Space. On the Nature
of the Electromotive Forces Occurring in a
Magnetic Field During Motion
Einstein derived the full expression for transforming arbitrary electromagnetic fields between reference frames. Then the link above took the known electric field (Coulomb's law - magnetic field = 0) in the frame where the charge is stationary and then simply calculated the magnetic field in a reference frame where the charge is moving.Per Oni said:As far as the Einstein OEMB paper is concerned I can only find a part where he Lorenz transforms existing magnetic fields in his chapter:
I looked up the Feynman-Heaviside equation and as far as I can see it is also derived starting with existing electrical and magnetic fields.
As for the site mentioned in post #5 my maths is not up to scratch but if it refers to equations 1512 – 1515 : then as usual it refers back to existing magnetic fields. However it would be nice for me and others if someone could simplify and see how this works for a straight conductor, ie can someone work out B parallel with a conductor and also B at a right angle with this conductor. (with his site in mind).
I still would like to see the transformation of a electrical field into a magnetic one. I have never ever seen a satisfactory solution.
Per Oni said:As for the site mentioned in post #5 my maths is not up to scratch but if it refers to equations 1512 – 1515 : then as usual it refers back to existing magnetic fields...
I still would like to see the transformation of a electrical field into a magnetic one. I have never ever seen a satisfactory solution.
DaleSpam said:Einstein derived the full expression for transforming arbitrary electromagnetic fields between reference frames. Then the link above took the known electric field (Coulomb's law - magnetic field = 0) in the frame where the charge is stationary and then simply calculated the magnetic field in a reference frame where the charge is moving.
I did underline because I wanted to see how a purely electrical field transforms into a magnetic one.I don't understand your underlined "existing" emphasis. If you have no EM field in one frame then you have no EM field in any frame. You have to have something existing in one frame in order to transform it into another frame. In this case you have a purely electric field in one frame and in all other frames you will have a mixed electric and magnetic field. But you cannot have no EM fields in one frame and some EM fields in another
Here it is, see section 6.Per Oni said:Hi DaleSpam can you give me the link to that paper? Yesterday I read one of his papers but either missed it or read the wrong paper.
[nitpick] I wouldn't call it a traveling E field. Fields don't have velocity. In one frame it is purely an E field, and in a frame which is traveling wrt that frame it is both an E and a B field. But there really isn't any sense in which the field itself has a velocity in either frame. [/nitpick]Per Oni said:a magnetic field can be caused by a traveling E field
LostConjugate said:So I am lost. Did someone just determine that pure relative motion causes a charge to be accelerated perpendicular to the direction of travel?
Per Oni said:Well no not exactly. We have to work out E prime first. E’=gamma E, but that’s all the Lorentz contraction done. Then B= - (E’xV)/C^2.
Thanks @ Dale
LostConjugate said:All that does it provide a relativistic correction the magnetic field. It does not show that the magnetic field IS a relativistic correction to the electrostatic force.
Per Oni said:Here it provides a Lorentz correction to the electric field. After this correction perhaps then we need to rethink this whole conversion from electric to magnetic field? No matter how hard you try its impossible to get a proper cross product just assuming further Lorentz corrections. But I’m open for suggestions.
When an electron moves, it creates a tiny electric current, which in turn creates a magnetic field. This is due to a fundamental property of electrons called spin, which causes them to act like tiny magnets. When a large number of electrons move in the same direction, their magnetic fields combine to create a larger, more noticeable magnetic field.
The direction of electron movement is directly related to the direction of the magnetic field it produces. When electrons move in the same direction, their magnetic fields align and reinforce each other, creating a stronger magnetic field. However, when electrons move in opposite directions, their magnetic fields cancel each other out, resulting in a weaker magnetic field.
Yes, an electron's speed does affect the strength of the magnetic field it produces. According to the Biot-Savart Law, the strength of a magnetic field produced by a moving charge is directly proportional to the speed of the charge. This means that the faster an electron moves, the stronger its magnetic field will be.
Magnetic fields produced by moving electrons have a specific shape because they follow the path of the electrons as they move. Magnetic field lines are circular and perpendicular to the direction of electron movement, forming a toroidal shape. This is due to the fact that the magnetic field is strongest in the area directly surrounding the moving electron.
No, not all types of movement can produce a magnetic field. In order to produce a magnetic field, the movement must involve charged particles, such as electrons. The movement must also be consistent and in the same direction. Random or chaotic movements do not produce a magnetic field.