it produces its own magnetic field the magnetic field cannot be turned on and off - it is there all the time Bar magnets and horseshoe magnets are examples of permanent magnets. An iron rod placed ...

it produces its own magnetic field the magnetic field cannot be turned on and off - it is there all the time Bar magnets and horseshoe magnets are examples of permanent magnets. The iron filings ...

The world’s largest exporter of rare earth minerals is currently restricting exports to the United States. Playing a key role in almost everything from EV motors to wind turbine ...