Interactions of Moving Particles: Magnetic Fields and Experimental Results

[crx]

Lets say we have two muons (or electrons, protons or larger bodies, etc) moving in the same direction with the same speed. If stationary they will repulse each other. If in motion to a stationary observer they will create and interact by the magnetic field around them, pulling toward each other. What the observer will see if travel at the same speed, and direction with the particles ? Repulsion or attraction? What is the laboratory experiment result ?


Another one is, if a magnetic compass will show any magnetic field around a straight wire with a dc current in it, if the compass is moving along the wire, same direction with the speed of the electrons, (a few mm/sec) ?
I know that this is an old question but i just can't find a satisfying answer...thanks!

 

[Meir Achuz]

The electric repulsion is always greater than the magnetic attraction for this case.
The electron drift velocity in a wire is very small. Moving a compass at that rate will have a negligible effect. The magnetic field of the wire is caused by the difference in motion of the electrons and the positive charge. This will not change by a slow motion of the compass.

 

[Entropia]

The interaction of moving particles and magnetic fields is a fundamental concept in physics that has been extensively studied through laboratory experiments. In the scenario described, where two muons (or other particles) are moving in the same direction with the same speed, the observer would see attraction between the particles. This is because the magnetic fields produced by the moving particles would interact and cause a force of attraction between them. This is known as the Lorentz force and is a fundamental principle in electromagnetism.

In laboratory experiments, this interaction has been observed and measured through various techniques such as particle accelerators and magnetic field detectors. These experiments have consistently shown that moving particles produce magnetic fields and interact with each other in the manner described above. This has been confirmed by numerous experiments and is a well-established principle in physics.

In the case of a magnetic compass moving along a straight wire with a dc current, the compass would show a deflection due to the magnetic field produced by the electrons in the wire. This is because the magnetic field produced by the electrons would interact with the magnetic field of the compass, causing a deflection. This has also been confirmed through laboratory experiments and is a well-known phenomenon in electromagnetism.

Overall, the interactions of moving particles and magnetic fields have been extensively studied and confirmed through laboratory experiments. These principles are essential for understanding many phenomena in electromagnetism and have practical applications in various technologies.