1. Magnetism

2. Magnetic Force
The force that one magnet exerts on another magnet, metal, or moving charges is magnet force.
Magnetic force (like electrical force) varies with distance, the closer the objects the greater the force
All magnets have magnet poles, the region where the magnet's force is the strongest

3. Magnetic Force’s (contd.)
Like poles repel one another
Opposite poles attract one another
Magnetic fields surround the magnet and exert magnetic force
Magnetic fields are the strongest at the poles
Note magnetic field lines are drawn from N pole to S pole
The closer the lines are together, the stronger the field

4. Magnetism
Magnet domains determine whether or not a material is a magnet
If the domains are aligned in the same direction then you have a strong magnet
Note many materials that are magnetized will not stay that way forever, they are called temporary magnets

5. Electromagnetism
A wire wrapped around a ferromagnetic core (soft iron) that is carrying a current will result in an electromagnet
The more wrapped around the ferromagnetic core the stronger the magnet
Many devices rely on electromagnets such as analog fuel gauges, electric motors, and loudspeakers