permanent and induced magnetism

• • all magnets have a north and south pole
  • all magnetics produce a magnetic field
  • a magnetic field is where other magnetic materials will experience a non contact force
• • the magnetic field is the strongest at the poles of a magnet
  • so, the magnetic forces are also the strongest at the poles
• • two like poles will repel each other
  • two unlike poles will attract each other
  • attraction and repulsion is an example of non-contact force
• • compasses show the direction of magnetic fields
  • compasses will always point north when not near a magnet
  • this is because the Earth generates its own magnetic fields. so the core of the earth must be magnetic
  • the compass points to the direction of the Earth's magnetic field
• • the two types of magnets are permanent and induced
  • permanent magnets produce their own magnetic field
  • induced magnets are magnetic materials that become a magnet when placed in a magnetic field
  • induced magnets always cause a force of attraction, so the force between permanent and induced magnet is always attractive
  • when removed from the magnetic field, an induced magnet will lose its magnetism quickly and will stop producing a magnetic field