This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are ...

First let us understand what magnets are. Electromagnets work by passing electricity through a wire wrapped around an iron core. The electric current creates a magnetic field, and when the current ...

Earth's main magnetic field is generated in the planet's outer core, a layer of molten iron 2,2001,800-3,100 miles ... complex than that of a regular bar magnet, the magnetic south pole ...

In other words, these magnets possess constant magnetic fields. There are four primary categories of permanent magnets: 2 types are made without rare earth elements, and 2 types incorporate rare ...

the direction of the magnetic field would not be unique at the point of intersection. 5.2.2 Bar magnet as an equivalent solenoid Cutting a bar magnet in half is like cutting a solenoid.