Magnets Magnets have different shapes and sizes.
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Horseshoe magnet |
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Circular magnet |
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Ring magnet |
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Cylindrical magnet |
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| Bar magnet |
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| U-shaped magnet |
Magnetic Forces
All magnets have a north and a south pole.
Unlike poles attract each other- the south pole of the magnet attracts the north pole.
Magnets attract objects made of certain materials like iron and steel, nickel and cobalt. A magnet will attract an iron nail or paperclip.
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| iron nails |
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| paperclips |
Like poles repel each other. The south pole of a magnet will repel the south pole of another magnet. The north pole of a magnet will repel the north pole of another magnet.
Magnets do not attract non-metal objects. Objects that are not attracted by magnets are non-magnetic, such as wood, plastic, rubber, cotton and glass.
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| wooden pencils |
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| plastic ruler |
Here are some videos that can tell you more about the magnets.
No enough ? Try this :
http://ppdhl.net/courseware/ScienceY3/cd2/lesson/main/index.html
NOTES:
- All the images above were taken from Google's images.
- Video clips were taken from Youtube.com
