Magnetism

Categories: Science
    • Lodestone naturally magneticUniversity of Birmingham: History of Magnetism
    • Magnetic fields always paired, with equal and opposite "north" and "south" polesNondestructive Testing (NDT) Resource Center: Magnetism
    • Opposite poles attract while like poles repel
    • Earth's magnetic field used for navigation with compasses
    • Ferromagnetism causes most magnetic behaviorNondestructive Testing (NDT) Resource Center: Magnetism
    • Ferromagnetic materials include iron, nickel and cobalt
  • Magnetism is a force which attracts oppositely magnetized objects to each other, and repels similarly magnetized objects from each other. Every electron is a tiny magnet, but in most materials, the spins of the electrons cancel each other out. In magnetic materials, the electrons can spin in the same direction and create a magnetic field.University of Birmingham: History of Magnetism
  • History of Magnetism

    • 800 BC: Lodestone's attractive power known in China and Europe
    • 1000s: Small pieces of iron used in compasses in China
    • 1820: Danish scientist Hans-Christian Oersted discovers connection between electricity and magnetism
    • 1898: First magnetic recording device developed by Danish engineer Valdemar Poulsen
    • 1900s: Permanent magnets developed

About this page

  • Page Views
    0
What is this?
No one is currently managing this page.

If you would like to apply
to be the manager of this page, please request below.

What is this?
This page currently has no vertical manager.