Permanent and Induced Magnets

• What are the two poles of a magnet?

  North and South
• What do magnets produce?

  Magnetic fields
• What are magnetic fields?

  A region where other agents or magnetic materials experience a force, this fore is non-contact
• How can a magnetic field be shown?

  Using magnetic field lines:

  
• What direction do magnetic field lines always go?

  North to south
• • The closer together the lines are, the stronger the magnetic field
  • The further away from a magnet you get, the weaker the field is
• Where is the magnetic field strongest?

  At the poles of a magnet. This means that the magnetic forces are also strongest at the poles
• How do two like poles act?

  Repel
• How do two unlike poles act?

  Attract
• How does a compass work?

  • They contain a tiny bar magnet
  • North Pole of magnet is attracted to the South Pole of any other magnetic it is near.
  • So the compass points in the direction of the magnetic field it is in
• What happens when compasses aren't near a magnet?

  • They always point north.
  • This is because the Earth generates its own magnetic field
  • which shows the core of the Earth must be magnetic
• What are the two types of magnets?

  • Permanent
  • Induced
• Permanent magnets?

  Produce their own magnetic field
• Induced Magnets?

  Magnetic materials that turn into a magnet when they're put into a magnetic field
• What is the force between permanent and induced magnets?

  Always attractive
• What happens when you take away the magnetic field from induced magnets?

  They quickly lose their magnetism and stop producing a magnetic field