Notes on magnetics

1. A magnetic field is a region which attracts magnetic forces.
2.There are two different forces, which are north and south.
3. We can use a test compass to find out the direction in which the north seeking pole of this compass would point at the point in space.
4. The metals that attracts magnetic forces are called ferromagnetic metals. All magnets are made of ferromagentics.
5. Domain theory of magnets Domain theory of magnets states all large magnets is made up of many smaller rotating magnets called dipoles. If dipoles line up, a magnetic domain is produced.
6. Right hand rules is a way to determine how magnetic forces is functioning. There are three right hand rules in total.
7. Oersted's principle states that change moving through a conductor produces a circular magnetic field around the conductor. 
8. Right hand rule # 1 is used for conventional current flow. See image for instructions

9. The second right hand rule is used for coils. See image for instructions
 
10. The strength of a magnet can be adjusted by using the opposite magnetic field (B).