How fast does an electron spin

AI Thread Summary
The discussion centers on the concept of electron spin, questioning its meaning given that electrons are considered point particles with no volume. It explores whether electrons can spin at any speed, including faster than light, and concludes that such calculations yield results exceeding light speed, which is impossible. The spin of an electron is described as a quantity related to its magnetic moment, similar to a current loop. Additionally, the conversation touches on the neutron's magnetic moment, clarifying that despite having no charge, neutrons possess a magnetic moment, indicating they are not fundamental particles. Overall, the complexities of particle spin and magnetic properties are highlighted.
brianhurren
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how fast does an electron spin? if an electron has no volume and is a point, then surly speed would have no meaning. So could it spin at what ever speed it likes? would it just be pure spin (think of a square, it has 4 corners and 4 sides, if the length of the sides were zero, then it would be just 4 corners, would it still be a square?) I was wondering could it spin at over the speed of light? or because of a lack of volume would that also be meaningless?
 
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the spin of electron is not actual spin.If you calculate the velocity of rotation of electron using the radius experimentally found you will get the speed is greater than speed of light and that is not possible.

here spin is quantity or number from which we can get the magnetic moment of the electron in analogy of the magnetic moment produced by a current loop

actually I am also not satisfied by this answer which I have been written above.My teacher told me this answer.

But from this answer I have another question that "Why is the spin of neutron defined ?"As neutron has no charge ,so no magnetic moment.
 
DHIMAN said:
"As neutron has no charge ,so no magnetic moment.

Please google "neutron magnetic moment" and decide if you might want to post a correction.
 
Sorry I was wrong.Neutron has a magnetic moment without having any charge which estimates that neutron is not a fundamental particle.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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