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8J MAGNETS AND ELECTROMAGNETS. Magnets. What is magnetism ? Where do we use magnets ? What materials are magnetic ?. Where do we use magnets ?. Find something magnetic in the class. Aim : To investigate which metals are magnetic. 1. Brass 2. Copper 3. Aluminium 4. Iron - PowerPoint PPT Presentation
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8J MAGNETS AND ELECTROMAGNETS
Magnets What is magnetism?
Where do we use magnets?
What materials are magnetic?
Where do we use magnets?
Find something magnetic in the class.
Aim: To investigate which metals are magnetic 1. Brass 2. Copper 3. Aluminium 4. Iron 5. Zinc 6. Tin 7. Lead 8. Scissors (Steel)
Magnetic Materials
Glass Copper Stone WoodPlastic
AluminiumSteel / Iron Ceramics Gold Nickel
Cobalt
Magnetic poles What are the two ends of a magnet
called?
What happens when you put two of the same poles near each other?
What happens when you put two different poles near each other?
Attraction & Repulsion
Magnetic fields What does a magnetic field show?
Sketch the magnetic field round a bar magnet.
Magnetism
S N
Magnetism
S N
Which direction is
the magnetic
field?
Where is the magnetic
field strongest?
Now, draw the magnetic field round a bar magnet using a plotting compass
The Earth’s Magnetic Field
Making magnets What is a magnet?
What is a magnetic material?
Are magnetic materials always magnets?
How can you make a magnet?
Turn the nail into a magnet…
Design a compassDesign a compass
The equipment you can use is: a paper clip foam Dish with water A compass (to check yours is right)
If you need any more equipment ask Ms. Stamp.
AF2- individual worksheet
ELECTROMAGNETS What is an electromagnet?
Why are electromagnets useful?
Where are electromagnets used?
Making an electromagnet Make an electromagnet, see how
many paper clips it can pick up
Draw a diagram of the electromagnetWrite about how you made it.
Maglev Train http://youtu.be/VuSrLvCVoVk
http://youtu.be/2--43eAS1iY
Extrahttp://youtu.be/weWmTldrOyo
Lab report assessment
Investigate how one factor affects electromagnet strength
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