Let us consider this:
One part of the force between moving charges we call the magnetic force. It is really one aspect of an electrical effect. — Richard Feynman
From relativity, this is infact true. Then why electric field lines are straight, pointing radially outwards, and magnetic field lines are in the form of a ring or a loop?
i)In other words why are they both different?
I should be able to see them the same way, no matter the frame of reference, right?
Now let me assume that the field lines are the way they are.
So let me get on my trolley and move along with the charged particle. I will see the charge getting repelled by electrostatic force. And I see the electric field lines(radially outwards)
Now I slowly decrease my speed....and finally come to rest.
At rest I will see the charge moving, as well as getting repelled by magnetic force. And now I will see magnetic field lines in the form of concentric circles.
ii)During my journey how will I see the lines getting transformed into loops?
P.S: The entire question is revolving around the phenomenon of a charged particle moving alongside a current carrying wire
Edit:From relativity, is magnetic field just a moving electric field? Or it just relates the forces?