of magnetic forces are a compass, a motor, the magnets that hold stuff
on your refrigerator, maglev trains, and many new roller coasters.
magnetic fields interact a with electrical currents, or with other
moving charges in general, force can be generated. Most people are
familiar with the interaction between permanent magnets--like those used
to hold documents on a refrigerator. That interaction is also due to
the relationship between electrical currents and the fields that they
generate. In the case of permanent magnets, those currents are quantum
mechanical in nature.
All moving charges give rise to magnetic fields, and charges that move through regions of magnetic field experience a force.
novel applications we are interested in the movement of a charged
particle in free space, but more often we are interested moving
electrons in a conductor. Electrons moving in a wire is current. Current
makes a magnetic field. This is easily proven my making an electro
I hope this answer helps you.............Be happy