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What is magnetic field strength?
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There are a number of ways in which the magnetic field strength H can be defined. In accordance with the ideas developed here we wish to emphasize the connection between the magnetic field H and the generating electric current. We shall therefore define the unit of magnetic field strength, the ampere per meter, in terms of the generating current.

The simplest definition is as follows. The ampere per meter: A magnetic field strength of 1 ampere per meter is produced at the center of a single circular coil of conductor of diameter 1 meter when it carries a current of 1 ampere.
by Wooden (698 points)
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Magnetic field strength is one of two ways that the intensity of a magnetic field can be expressed. The magnetic field can be visualized as magnetic field lines. The field strength corresponds to the density of the field lines.
by Wooden (2,549 points)
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It is one of two ways that the intensity of a magnetic field can be expressed.
by Wooden (310 points)

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