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Feb14-13, 09:55 AM
P: 36
Thanks for the answers! I understand a little bit better now, although i still have many things im curious about.

Quote Quote by Jano L. View Post
The magnetic field is present in the sense that moving charges would experience magnetic force.
So what exactly does it mean to "experience this magnetic force"? Im not sure what these forces actually do to the charges that pass through them. Does the magnetic field create some kind of attraction or repulsion? How does this attraction or repulsion vary from electrostatic? I read something about 2 electrons travelling side by side- ultimately their electrostatic forces will repel each other, but the faster they go, the magnetic fields they generate will create a higher degree of attraction between the two? I dont understand the mechanism of how this attraction is created via movement, and what exactly it attracts or repels.

However, as the magnetic force acts only on moving charges, there is no action of magnetic field on the second charge. This means that in the situation as you described it, the magnetic field does no exhibit itself.
Ohhh, ok, so not only does the particle have to move to generate a magnetic field, but another particle has to be "moving" through the field to be affected by it.

But in this case how is movement defined? If you have 2 electrons, and one is moving east @ 100 feet per second, and the second is moving east @ 50 feet/sec, they would both exert a magnetic field on each other, correct? But isnt movement relative? Couldnt one say that relative to electron 1, electron 2 is standing still, and electron 1 is going 50 fps?

Sorry for all the questions, my mind just naturally seeks out the root answers and explanations to things...