Difference between revisions of "Magnet"
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| + | | style="height:20px; width:200px; text-align:center;" |The [[Bar Magnet|bar magnet]] is a [[Permanent Magnet|permanent magnet]]. | ||
| + | | style="height:20px; width:200px; text-align:center;" |This is a [[diagram]] of an [[electromagnet]]. | ||
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Revision as of 08:43, 4 March 2019
Contents
Key Stage 1
Meaning
A magnet is an object that sticks to some metals.
About Magnets
- Magnets are very useful. We can use them to stick notes to the fridge.
Key Stage 2
Meaning
A magnet is a piece of equipment that can be used to do determine if a material is magnetic.
About Magnets
- Magnets are attracted to some metals. Those metals are magnetic but they are not magnets themselves.
- Magnets have two poles; North and South.
- When two North Poles are placed next to each other two magnets will repel each other.
- When two South Poles are placed next to each other two magnets will repel each other.
- When the North Pole of one magnet is placed next to the South Pole of another magnet they attract each other.
Examples
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| Magnets are attracted to some metals. Those metals are magnetic but they are not magnets themselves. | Magnets have two poles; North and South. |
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| Two magnets facing North-North will repel each other and two magnets facing South-South will repel each other. | Two magnets facing North-South will attract each other. |
Key Stage 3
Meaning
A magnet is an object that attracts Iron, Cobalt or Nickel.
About Magnets
- There are three types of magnet you should know:
- Permanent Magnets - These are magnets which have a permanent magnetic field which needs energy to be removed.
- Induced Magnets - These are magnetic materials which only become magnets when they are in the magnetic field of another magnet.
- Electromagnets - These are a coil of wire wrapped around a soft iron core. They only become magnets when there is a current passed through the coil of wire.
- Magnets are attracted to some metals (Cobalt, Nickel and Iron. Those metals are magnetic but they are not magnets themselves.
- Magnets have two poles; North and South.
- When two North Poles are placed next to each other two magnets will repel each other.
- When two South Poles are placed next to each other two magnets will repel each other.
- When the North Pole of one magnet is placed next to the South Pole of another magnet they attract each other.
- All magnets have a magnetic field around them which influences other magnetic materials.
Examples
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| The bar magnet is a permanent magnet. | This is a diagram of an electromagnet. |