Main Question or Discussion Point
what is magnetic field and ? how it forms ?
as you know, an electric field originates from electric chargewhat is magnetic field and ? how it forms ?
from http://en.wikipedia.org/wiki/Magnetic_field" [Broken] …and i want know difference between magnetic field intensity and magnetic flux
Is it purely a relativistic side effect? If so, I don't see how charges could ever produce a magnetic field that would attract other like charges without being in a material such as a conductor. For example when you accelerate a beam of protons.When a charge is in a different frame than you are, you will observe a magnetic field. It is not there for all frames. It is a relativistic side effect.