Permanent and Induced Magnets

• What is a magnetic material?

  Any object influenced by a magnetic field
• What distinguishes an actual magnet from a magnetic material?

  An actual magnet produces a magnetic field
• Which elements are commonly known as magnetic materials?

  Nickel, cobalt, and iron
• Why might some pieces of nickel not be magnets?

  Only some pieces are influenced enough
• What acronym can help remember common magnetic elements?

  NCIS
• What are permanent magnets?

  Magnets that produce a magnetic field constantly
• What are induced or temporary magnets?

  Magnets that have a field only temporarily
• How is an induced magnet created?

  By placing a magnetic material in a magnetic field
• What happens to an induced magnet when removed from a magnetic field?

  It loses its magnetism
• What are magnetically soft materials?

  Materials that lose magnetism quickly
• What are magnetically hard materials?

  Materials that lose magnetism slowly
• What are the differences between permanent magnets and induced magnets?

  • Permanent magnets:
  • Produce a magnetic field constantly
  • Induced magnets:
  • Have a magnetic field temporarily
  • Created by external magnetic fields
• What is the relationship between permanent and induced magnets?

  • The force between them is always attractive
  • Induced magnets develop their own poles