1. Done by Chloe, Margareta and Venus
Uses of Magnets
Done by Chloe, Margareta and Venus

2. Properties of a magnet
A magnet is a piece of material that has the ability to attract magnetic materials.
Every magnet has a north and south pole.
Like poles repel each other
Unlike poles attract each other
Magnets attract magnetic materials such as iron, steel, cobalt, and nickel.

3. Methods of making a magnet
By stroking
By using electricity

4. The stroking method

5. The electric method

6. Different shapes of magnets
Bar magnet
Horse shoe magnet
U-shape magnet
Button magnet
Ring magnet

7. Electromagnets Electromagnets:
-Used in scrap yards to pick up and move heavy pieces of metal
-Used inside a doorbell to allow the hammer to hit the bell

8. Uses of magnets
On the fridge door(permanent): To stick notes on the door
Fridge door(permanent): To keep the fridge are tight
Vacuum cleaner(temporary): To allow the cleaner to suck things
Credit cards(permanent): To store data

9. Uses of magnets
Video-recording devices (permanent): To record sounds and images
Our Mac Book (permanent): To close our Mac tightly
High speed train (powerful electromagnet): To lift, guide, and move the train. This reduces friction which allows the train to be fast.

10. Magnets in a speaker
Contains permanent magnet as well as electromagnet.
The electromagnet is formed by a coil of wire
The magnetic field of the coil interacts with the magnetic field of the permanent magnet.
This creates a force that moves to the coil.
This process conveys amplified sound that is received as an electrical signal in the speaker

11. Magnetic Field Lines
When you are drawing magnetic field lines, the direction of the arrows are always going from north to south.
Magnetic fields are the region around the magnet where other magnetic material will experience a force.
Telsa(T) is the unit of magnetic-field strength.
When the field lines are close together at a point, the point is said to have a strong magnetic field.
Field lines never cross.

12. Magnetic Field Lines

13. Thank you for listening!