magnetism

Cards (13)

  • magnetic materials:
    • iron
    • nickel
    • cobalt
    • steel
  • what happens when like poles meet?
    they repel
  • what happens when unlike poles meet?
    they attract
  • how to check if a piece of metal is magnetic?
    it should repel a known magnet
  • magnetically hard materials?
    those who retain their magnetism once they've been magnetised
  • magnetically soft materials?
    those that don't stay magnetic once the outside magnetic influence is removed
  • magnetic field?
    region of space where the magnet affect other objects
  • magnetic field lines?
    line which show the path that a north pole ending up at a south pole. direction of force caused by the magnet
  • closer magnetic fields lines show...
    stronger magnetic field
  • induced magnetism?

    when a soft magnet material becomes magnetised after brought near a magnet
  • hard magnets are permanent magnets
  • soft magnets are temporary magnets
  • magnetic field shape:
    we can see it using iron filings
    • place the bar magnet on a flat surface
    • put a piece of card over the magnet
    • gently tap the card
    • the iron filings should line up with the magnetic field