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'''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.

'''Magnetic Fields''', resulting from the flow of electrons in metal, impose an action-at-a-distance force on other charged particles nearby.  This means that charged metals respond to magnetic fields by changing direction, or becoming attracted to or repelled from the field.

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>

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.  According to the "right hand rule," using your right hand to indicate the direction of current, the curl of the remaining fingers indicates the magnetic field, which is always perpendicular to the current, and running in the indicated.

== One Historical View of the [[Earth]]'s Magnetic Field ==

==Earth's Magnetic Field==

The magnetic field of [[Earth]] is directional nearly north-to-south, although slightly askance, meaning that "magnetic north" is not the same as "true north," and a person who is orienteering must take into account this change of declination, although it is truly only marginally relevant, unless you are close to either pole.<ref>Boy Scout Handbook.</ref>  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>  This decay suggests that, at some point, the poles will invert.

[[Image:magnetic_field.gif|right|thumb|The View of "Answers in Genesis"]]

[[Image:magnetic_field.gif|right|thumb|The View of "Answers in Genesis"]]