magnetic permeability

- Its symbol is μ. A quantitative indicator of the
__response__of a material or__medium__to a magnetic field. It is expressed by the following formula: μ =, where*B/H*is the magnetic flux density of the material or medium, and*B*is the strength of the surrounding magnetic field. Relative permeability is obtained using the following formula: μ*H*_{r}= μ/μ_{0}, where μ_{r}is relative permeability, and μ_{0}is the permeability of free space. The absolute permeability of__free space__is a__physical____constant____equal__to approximately 1.256637 × 10^{-6}__henry__per__meter__, and its relative permeability is equal to 1, as seen by the this formula. Materials whose relative permeability is less than 1 are diamagnetic, those slightly above 1 are paramagnetic, and those substantially above 1 are__ferromagnetic__. Also known as magnetic conductivity, or permeability (1). - synonym magnetic conductivity

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