Reference Terms
from Wikipedia, the free encyclopedia

Magnetic field

In physics, a magnetic field is that part of the electromagnetic field that exerts a force on a moving charge.

A magnetic field can be caused either by another moving charge (i.e., by an electric current) or by a changing electric field.

Note:   The above text is excerpted from the Wikipedia article "Magnetic field", which has been released under the GNU Free Documentation License.
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July 29, 2015

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