1. Magnetism Attractive and Repulsive

2. What Is A Magnet? Magnet: any object that attracts iron or materials containing ironMagnet: any object that attracts iron or materials containing iron 1. Two poles 2. Exert forces 3. Surrounded by a magnetic field magnetic field

3. Magnetic Poles Every magnet has two polesEvery magnet has two poles The parts of a magnet where the magnetic effects are the greatest

4. Magnetic Forces The force of repulsion or attraction between the poles of magnetsThe force of repulsion or attraction between the poles of magnets

5. Magnetic Fields Exist in the region around a magnet in which magnetic forces can actExist in the region around a magnet in which magnetic forces can act Simulated Magnetic Field Drawing Actual Iron Filling Behavior

6. Half a Magnet? What happens if you cut a magnet into pieces?What happens if you cut a magnet into pieces?

7. Electromagnetism The interaction between The interaction between electricity and magnetism electricity and magnetism

8. Solenoids A coil of wire that produces a magnetic field when carrying an electric currentA coil of wire that produces a magnetic field when carrying an electric current

9. Electromagnets Magnet that contains a solenoid wrapped around an iron coreMagnet that contains a solenoid wrapped around an iron core Hundreds of times stronger due to the combined magnetism of the solenoid and the iron core