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magnetic flux density

The magnetic flux density (B) is the quotient of the magnetic flux Phi and the area "A" through which it passes. It is derived from the force on moving charges. Like the field strength (H), the flux density is a directional quantity.

In vacuum and in air, the flux density (B) corresponds to the product of the magnetic field constant µ0 and the magnetic field strength (H). The ratio of magnetic flux density to magnetic field strength in empty space is the magnetic field constant µ0.

Determining the magnetic field constant µ0

Determining the magnetic field constant µ0

Strong permanent magnets, e.g. holding magnets with a breakaway force of 1,000 Newtons (N), achieve a magnetic flux density of 0.5 Tesla (T) to 1 Tesla. The earth 's magnetic field is approximately 0.05 Tesla. The flux density of a coil also depends on whether or not iron is inside the coil. Iron increases the magnetic flux density of a coil with current flowing through it. The reason for this are the Weiss' districts.

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Englisch: magnetic flux density
Updated at: 03.12.2019
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