Moving charge creates a magnetic field

[magu1re]

Hey.

I am learning about electromagnetism and have been told that a moving charge creates a magnetic field which can then interact with an external magnetic and produces a force on the moving charge which is the basis of the motor effect etc.

I am now onto electromagnetic induction and am told that moving a conductor or an external magnetic field relative to one another induces current within the wire. This is explained in terms of the motor effect by moving the conductor and leaving the external field be. However, moving the external field and leaving the conductor be still produces the same effect.

This implies to me that charges always create a magnetic field regardless of whether they are moving. Otherwise, the explanation of electromagnetic induction is missing something crucial.

Any pointers would be much appreciated.

 

[Drakkith]

The production of a magnetic field is solely the result of moving electric charges. In a standard electromagnet, you have many electrons (negative charges) moving the same way in circles, which generates large magnetic fields.

These magnetic fields can then exert pressure on the electrons and protons in a conductor. However, because electrons are MUCH lighter than protons, and the fact that the valence electrons in a conductor are not bound to individual atoms, applying this force causes the electrons to move through the conductor, generating current.

ALSO, the magnetic field is ACTUALLY a product of relativity. Moving charges with relation to a static observer causes length contraction. This site explains it pretty well. http://physics.weber.edu/schroeder/mrr/MRRtalk.html

Just remember to stay focused on your schoolwork and use what you learned there for your quizzes and tests and such. Don't try to "correct" the teacher or class with anything you find on that site, as you will only hurt yourself.

 

[magu1re]

The production of a magnetic field is solely the result of moving electric charges. In a standard electromagnet, you have many electrons (negative charges) moving the same way in circles, which generates large magnetic fields.

These magnetic fields can then exert pressure on the electrons and protons in a conductor. However, because electrons are MUCH lighter than protons, and the fact that the valence electrons in a conductor are not bound to individual atoms, applying this force causes the electrons to move through the conductor, generating current.

ALSO, the magnetic field is ACTUALLY a product of relativity. Moving charges with relation to a static observer causes length contraction. This site explains it pretty well. http://physics.weber.edu/schroeder/mrr/MRRtalk.html

Just remember to stay focused on your schoolwork and use what you learned there for your quizzes and tests and such. Don't try to "correct" the teacher or class with anything you find on that site, as you will only hurt yourself.

Cool. Is it the case that moving magnetic fields generate an electric field and it the production of this field which results in interaction between electric fields thus exerting the pressure on the protons and electrons (or any charged particles) which you write of?