1. 21-1 Magnets and and Magnetic Fields

2. Magnets North and South poleNorth and South pole –Like poles repel –Opposite poles attract

3. Permanent Magnets Hard Magnetism -Hard Magnetism - Soft Magnetism -Soft Magnetism - –Hard to magnetize but retain magnetism Cobalt and NickelCobalt and Nickel –Easy to magnetize, but do not retain magnetism IronIron

4. Magnetic Fields Surround magnetized materialSurround magnetized material Direction is the direction a compass pointsDirection is the direction a compass points –Away from N, towards S Strongest at the polesStrongest at the poles

5. Magnetic Fields Where do field lines start? Where do they end?

6. What might the electric fields look like for these magnets? Draw them!

7. New vector symbols Into the pageInto the page Out of the pageOut of the page – – – X X X X X

8. Earth’s Magnetic Field

9. Aurora Borealis

10. So where do magnetic fields come from? Witchcraft?? Ian Mckellen???