Answer the bottom 6 on Cornell Notes

Properties of Magnets•A magnet is any material that exerts a magnetic force.

•Magnets attract or repel other magnets.

•One part of a magnet will always point north when allowed to swing freely

Magnetic Fields•The magnetic field is the area of magnetic force around a magnet

• Allows magnets to interact without touching

•Magnetic field lines are the invisible lines that map out the magnetic field of a magnet

• Form complete loops, never cross

• Always leave north and enter south

• Distance between field lines indicate the strength of the magnet

• Closer the lines, stronger the lines

Magnetic Domains•A magnetic domain is a region where the magnetic fields of all atoms are lined up in one direction

•If the material is NOT magnetized, the magnetic domain points in random directions

•If the material is considered a magnet, the magnetic domains are arranged in the same direction

Magnetic Materials•A ferromagnetic material is a material that shows strong magnetic properties

• Behaves like a piece of iron

• Iron, nickel, cobalt, samarium

•Alloy magnets - magnets made from several different metals

• Alnico - aluminum, nickel, iron, cobalt

• Platinum and cobalt

•Ferrite - mixture of substances that contain ferromagnetic elements

• Most commonly used today

• Brittle material but inexpensive