Permanent and Induced magnets

• Not all magnetic materials are actual magnets. What is the difference between an actual magnet and a magnetic material?

  • Actual magnet = an object that produces a magnetic field
  • Magnetic material = any object that can be influenced by a magnetic field, and has the potential to become a magnet
• What are the 4 magnetic materials?

  • Nickel
  • Iron
  • Cobalt
  • Steel
• What are permanent magnets?

  Magnets that produce their own magnetic fields, all the time
• What are induced magnets? (also known as temporary magnets)

  Magnetic materials that become magnets when they are placed in a magnetic field, and they only have a magnetic field temporarily
• How are induced magnets made? (how do they gain their temporary magnetic field)?

  When a piece of magnetic material is placed into the magnetic field of a permanent magnet, this induces the magnetic material to develop its own magnetic field
• What is the force between a permanent and induced magnet always like?

  The force between a permanent and induced magnet is always attractive
• What happens when you remove an induced magnet from a permanent magnet's magnetic field?

  It will lose its magnetism
• What is a magnetically soft material, give two examples?

  A magnetically soft material is a magnetic material that loses its magnetism very quickly after it has been removed from a permanent magnet's magnetic field

  • Examples of magnetically soft materials are: nickel and iron
• What is a magnetically hard material? give an example.

  A magnetically hard material is a magnetic material that loses its magnetism slowly after it has been removed from a permanent magnet's magnetic field

  • An example of a magnetically hard material is steel