Magnetic-permeability meaning

A measure of the ability of a substance to sustain a magnetic field, equal to the ratio between magnetic flux density and magnetic field strength. For a vacuum, its value is 1.257 × 10−6 henries per meter. Highly magnetizable materials, such as ferromagnetic materials, have higher magnetic permeability.
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The degree of magnetization of a substance in a given magnetic field, equal to the ratio of magnetic flux density to magnetic field strength.
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(physics) A measure of the magnetisation of a material in a magnetic field; symbol μ. Materials with values less than 1 are diamagnetic those above are paramagnetic.
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