Permanent and Induced Magnets

• What is the difference between permanent and induced magnets?


  Permanent magnets produce their own magnetic field
• What are the two ends of a bar magnet called?

  North Pole and South Pole
• Where are magnetic forces strongest on a magnet?

  At the poles of the magnet
• What happens when two like poles of magnets are brought together?

  They repel each other
• What occurs when unlike poles of magnets are brought together?

  They attract each other
• What type of forces are attraction and repulsion between magnetic poles?

  Non-contact forces
• What does a permanent magnet produce?

  Its own magnetic field
• What happens when a permanent magnet is brought close to another permanent magnet?

  They can attract or repel each other
• What is an induced magnet?

  An object that becomes a magnet in a magnetic field
• What happens to objects placed in a magnetic field created by a permanent magnet?

  They become induced magnets
• What is the key fact about induced magnetism?

  It always causes a force of attraction
• What happens to induced magnets when the permanent magnet is removed?

  They lose most or all of their magnetism
• What are the characteristics of permanent and induced magnets?

  • Permanent magnets:
  • Produce their own magnetic field
  • Can attract or repel other magnets
  • Induced magnets:
  • Become magnets in a magnetic field
  • Always attract other magnets
  • Lose magnetism when the field is removed
• What are the interactions between magnetic poles?

  • Like poles (North-North or South-South):
  • Repel each other
  • Unlike poles (North-South):
  • Attract each other