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magnetism - Coggle Diagram
magnetism
Magnetic Materials
Iron, nickel and cobalt are the only pure metals that can be turned into a magnet. These metals are “magnetic materials”.
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Magnetic materials can be attracted by a magnet, but can’t be repelled by a magnet.
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Permanent magnets are always magnetic, even when they are not near other magnets.
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Induced Magnetism
A magnetic material will temporarily become a magnet when it is close to a permanent magnet. There is always an attractive force between an induced magnet (or magnetic material) and a permanent magnet.
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When moved away from the permanent magnet, the magnetic material will stop being a magnet.
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Poles
The permanent magnet induces (creates) temporary poles in the magnetic material and these align so that the magnetic material is attracted to the permanent magnet.
If the north pole of the magnet is next to the magnetic material, then a south pole will be induced in the part of the material closest to the magnet.
Magnetism
Magnetism describes the ability of magnets to attract (pull towards) and repel (push away) other magnets without touching them.
Attraction
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If two magnets are close enough to each other, then the south pole of one magnet will attract the north pole of the other magnet.
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Repulsion
If one magnet is turned so that both south poles (or both north poles) are close together, then the magnets will repel each other.
Opposite poles on a magnet attract and like poles on a magnet repel. This is an example of a non-contact force.
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Magnets
The key phrase to remember when thinking about magnet behaviour is: 'like poles repel, unlike poles attract'.
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