Difference between revisions of "Magnetic field"
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| − | '''Magnetic Fields''', also known as B-fields, are force fields | + | '''Magnetic Fields''', also known as B-fields, are force fields that can be explained by [[relativistic]] effects of [[electric current]]s. Magnetic fields only exert a force on moving [[charge]]s. |
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| + | The magnetic field of [[Earth]] is directional nearly north-to-south. This field has been decaying at a rapid rate of about about 5% per century, which casts doubt on the theory that the [[Earth]] is billions of years old.<ref>K.L. McDonald and R.H. Gunst, ‘An analysis of the earth’s magnetic field from 1835 to 1965,’ ESSA Technical Report, IER 46-IES 1, U.S. Govt. Printing Office, Washington, 1967.</ref> | ||
== References == | == References == | ||
<references/> | <references/> | ||
[[category:physics]] | [[category:physics]] | ||
Revision as of 21:26, August 24, 2007
Magnetic Fields, also known as B-fields, are force fields that can be explained by relativistic effects of electric currents. Magnetic fields only exert a force on moving charges.
The magnetic field of Earth is directional nearly north-to-south. This field has been decaying at a rapid rate of about about 5% per century, which casts doubt on the theory that the Earth is billions of years old.[1]
References
- ↑ K.L. McDonald and R.H. Gunst, ‘An analysis of the earth’s magnetic field from 1835 to 1965,’ ESSA Technical Report, IER 46-IES 1, U.S. Govt. Printing Office, Washington, 1967.