Magnetism

• The pole has the strongest force of the magnet
• Opposite poles attract, like poles repel.
• A magnet produces a magnetic field
• permanent magnetic: produce their own magnetic field all the time
• Induced/temporary magnets: only have magnetic field temporarily
• Magnet


  Any material or object that produces a magnetic field
• Magnets


  • Have two poles: north and south
  • Surrounded by a magnetic field
• Representing magnetic fields


  1. Draw field lines from north pole to south pole

  2. Draw straight lines into south pole and out of north pole

  3. Draw curved lines into south pole and out of north pole

  4. Draw loops from north to south pole
• More dense field lines indicate stronger magnetic field
• Finding magnetic poles and field lines

  1. Use a compass

  2. Compass needle aligns with field lines

  3. Compass points towards south pole
• North poles of two magnets pushed together

  Magnets repel
• Opposite poles of two magnets brought together

  Magnets attract
• Magnetic field diagrams:

  
• The closer the lines are, the stronger the magnetic field.
• Magnetic materials

  Iron, cobalt, nickel, steel