Magnets

• What does a permanent magnet produce?

  Its own magnetic field
• Where is the magnetic field strongest in a permanent magnet?

  At the poles
• How does magnetic field strength change with distance?

  It decreases with distance
• What do field lines indicate in a magnetic field?

  Direction of force on a north pole
• What are magnetic fields?

  Regions where magnetic materials experience force
• Where is the magnetic field stronger?

  Where field lines are closer together
• What happens between like poles of magnets?

  They repel each other
• What happens between unlike poles of magnets?

  They attract each other
• What type of forces are between magnets?

  Non-contact forces
• What is an induced magnet?

  A magnetic material that becomes a magnet
• Name four magnetic materials.

  Iron, nickel, cobalt, permanent magnet
• What happens when an induced magnet is moved away from a permanent magnet?

  It quickly loses all or most magnetism
• What are the key characteristics of permanent and induced magnets?

  • Permanent magnets produce their own magnetic field.
  • Induced magnets become magnets in a magnetic field.
  • Permanent magnets and induced magnets attract each other.