Magnetism

Magnetism The property of attracting certain metals An invisible or noncontact force Involves a push or a pull

Purpose of Magnets Why do we use magnets? To hold objects together To connect to other objects To separate objects/groups of objects Common Uses Refrigerators Junkyards White boards Doorbells Electronics Compasses

Purpose of Magnets

C cobalt I iron N nickel S steel Magnetic Materials C cobalt I iron N nickel S steel

Magnetic Materials Cobalt Iron Nickel Steel

Attract or Repel? Attract – a pull “Opposites Attract” North to South or South to North Can occur with a magnet and a magnetic material or with two magnets Repel – a push “Likes Repel” North to North or South to South Can only occur with two magnets

Attract or Repel?

The invisible force field around a magnet and the Earth Magnetic Field The invisible force field around a magnet and the Earth

Electromagnets A type of magnet where the magnetic field is produced by an electric current