1. 8.1 Natural Magnetism & Electromagnetism

2. Natural Magnetism

3. Magnetic Poles

4. Magnetic Fields of Force

5. The Earth’s Magnetic Field

6. Domain Theory Domains are naturally unaligned
Align using another magnet
Randomize alignment by heating, hitting

7. Moving charges create magnetic fields

8. Right-handed vs. left-handed
Right-hand rule
Conventional flow (as in, it’s a convention)
Assumes charge carriers are positive
Mathematically elegant
Physically wrong
Used in textbook, online notes
Left-hand rule
Electron flow
Assumes charge carriers are negative
Mathematically awkward (because of the negative sign)
Physically correct
Used by engineers, people who know better

9. Brother, can you lend a (right) hand?
One thumb, one wire
Many fingers, many field lines