- #1
kmarinas86
- 979
- 1
The "work" done by two electromagnets
It has been said that magnets attract and repel by involving the use of electric fields.
If so, how does the shape of the electric field change when an iron bar is magnetized?
I would presume that the relative motion of the magnet as a whole is not what causes the magnetization because one can measure a magnetic force between two magnets held apart from each other. So the magnetic force must somehow exist even for magnetic dipoles that are stationary in relation to one another.
It is not as if the force field around the magnet functions as an electric dipole having - and + ends! Where does one see electric field lines sticking out of a magnet to explain "magnetic" attraction and repulsion? Doesn't the magnetic field in fact derive its origins from electric currents that exist right angles to the magnetic field lines? Any current induced by magnetic fields would of course be induced only at a right angle to the magnetic fields, with no preferred direction along (or even at right angles) to the magnetic field as these motions would be exactly canceled (due to being induced within in a current "loop"), so generation of such currents obviously cannot explain acceleration of magnets along their field lines either.
It has been said that magnets attract and repel by involving the use of electric fields.
If so, how does the shape of the electric field change when an iron bar is magnetized?
I would presume that the relative motion of the magnet as a whole is not what causes the magnetization because one can measure a magnetic force between two magnets held apart from each other. So the magnetic force must somehow exist even for magnetic dipoles that are stationary in relation to one another.
It is not as if the force field around the magnet functions as an electric dipole having - and + ends! Where does one see electric field lines sticking out of a magnet to explain "magnetic" attraction and repulsion? Doesn't the magnetic field in fact derive its origins from electric currents that exist right angles to the magnetic field lines? Any current induced by magnetic fields would of course be induced only at a right angle to the magnetic fields, with no preferred direction along (or even at right angles) to the magnetic field as these motions would be exactly canceled (due to being induced within in a current "loop"), so generation of such currents obviously cannot explain acceleration of magnets along their field lines either.