Magnetic Substances & Magnetic Fields

Magnetic Substances A magnet is an object that can attract other objects containing iron, cobalt, or nickel. Has two opposite poles - North and South Similar poles repel & opposite poles attract The magnetic field can be mapped

Ferromagnetic Substances Not a magnet but something that can become magnetized by hitting, heating, or touching it with a magnet OR by adding an electrical charge (electromagnet) Is attracted by a magnet Must contain one of the following: iron, nickel or cobalt The magnetism can be turned on and off.

Non-magnetic Substance Cannot be magnetized Glass, plastic, rubber or wood Work well as insulators for electrical wires

Mapping Magnetic Fields Rules: The magnetic field lines can never cross Always flow from North to South The closer the lines, the stronger the attraction

Compass The needle of the compass is magnetic Red (or any color) tip of the needle is considered North and will always be attracted towards its opposite the South