AP Physics 2 / Unit 12: Magnetism and Electromagnetism
12.1 Magnetic Fields
Notes
Magnetic fields come from moving charges and magnets. Field lines run from north to south outside a magnet and form closed loops.
- Magnetic poles always come in pairs.
Practice
Outside a bar magnet, field lines point:
By convention.
Cutting a magnet in half gives:
No monopoles.
Earth's magnetic field is produced by:
Geodynamo.
Ready for more? Take the Unit 12 test.