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| | Magnetic field - Wikipedia, the free encyclopedia |
 | | Earth's magnetic field - a discussion of the magnetic field of the Earth. | | | Hoadley, Rick, "What do magnetic fields look like? | | | Because magnets degrade with time, synchronous motors and induction motors use short-circuited rotors (instead of a magnet) following rotating magnetic field of multicoiled stator. |
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http://en.wikipedia.org/wiki/Magnetic_field
(2430 words)
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| | Earth's magnetic field - Free Encyclopedia |
| | The Earth's magnetic field reverses at intervals, ranging from tens of thousands to hundreds of thousands of years. | | | Another feature that distinguishes the Earth magnetically from a bar magnet is its magnetosphere. | | | The cause of Earth's magnetic field (the surface magnetic field) is not known for certain, but is possibly explained by dynamo theory. |
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http://www.wacklepedia.com/e/ea/earth_s_magnetic_field.html
(316 words)
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| | magnetic field - Hutchinson encyclopedia article about magnetic field |
| | The Man in the Iron Mask by Dumas, Alexandre View in context | | | A magnet is an object that forms a magnetic field. | | | As iron is a magnetic material, iron filings shaken around a magnet will form along the lines of force and produce the pattern of the magnetic field. |
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http://encyclopedia.farlex.com/magnetic+field
(374 words)
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| | galactic magnetic field |
| | Similar fields exist in other disk galaxies; those of elliptical galaxies are more difficult to estimate because of the lack of interstellar matter. | | | A weak and largely disordered magnetic field, with a strength of about 5 × 10 |
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http://www.daviddarling.info/encyclopedia/G/galactic_magnetic_field.html
(136 words)
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