1. Magnetism

2. Natural Magnets
Natural magnets like lodestone, are found in nature

3. Artificial Magnets
Artificial or man made magnets are made by magnetising:
Iron
Nickel
Cobalt
Alloys of the above

4. The Poles
Magnets are strongest at their 2 ends called the “north pole” and the “south pole”.
Like Poles Repel and Unlike Poles Attract.

5. Unike Poles Attract

6. Like Poles Repel

7. How to Test if Something is a Magnet?
The true test for determining if something is a magnet is repulsion.

8. A Designer Floating Bed

9. The Earth’s Magnetic Field
The Earth behaves as if there is a huge bar magnet in its centre giving it a magnetic field.

10. What is a Magnetic Field?
A magnetic field is the space around a magnet over which it has a magnetic effect.

11. How a Compass works?
A freely suspended magnet always comes to rest with one end pointing I a northerly direction.

12. A Compass
A compass contains a freely suspended magnet which reacts to the magnetic field of the Earth.

13. Electricity and Magnetism
Electricity can make a magnet and a magnet can be used to create electricity.

14. A wire with a current flowing through it has a magnetic field around it.

15. An Electromagnet
An electromagnet only is a magnet when current flows through its coil.

16. Uses of Magnets Electric Motors Electric Bells Bicycle Dynamo
Transformers
Loudspeakers
CTRs
Computers
Phones

17. Complete the following in your answerbook: Like poles ___________, unlike poles ___________
List two uses of magnets.
What is a compass and how does it work?
What is a space around a magnet called?
Draw a diagram of a bar magnet and sketch some magnetic field lines around it.
Show by means of arrows the directions of the lines of force.