Moving electrons: magnetic and electric fields

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Moving electrons create both electric and magnetic fields simultaneously. When electrons are in motion, they generate a magnetic field, but this does not eliminate the presence of an electric field. In scenarios like those at the Stanford Linear Accelerator Center, bunched electrons moving at high speeds produce electric fields as well. Similarly, devices like klystrons also exhibit both types of fields due to the movement of electrons. Therefore, an observer outside the line of moving electrons would detect both an electric field and a magnetic field.
ninjadrummer8
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Ok I have a general question. Say I have a bunch of electrons moving in a line, not in a wire, but I guess it could be looked at as if it was in a wire.

This is my question: So if i picked a point outside of this line of moving electrons, would I find an electric field?

I know that there is a magnetic field for sure, and I know that if the electrons were NOT moving, that there would be an electric field. What I'm not sure of is if the magnetic field replaces the electric field or not.
 
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Yes.

You can have both kinds of fields simultaneously.
 
If you consider bunches of electrons traveling at (nearly) the speed of light in a vacuum tube (for example at the Stanford Linear Accelerator Center), the bunched structure of the electrons gives rise to electric fields. The same is true for a certain class of microwave electron tubes called klystrons.
 
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