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In electromagnetism, permeability is the degree of magnetisation of a material that responds linearly to a magnetic field. Absolute permeability is represented by the symbol μ. In SI units, permeability is measured in henrys per metre. <math>\mu_0 \,<math> is known as the Permeability of free space (absolute permeability below)
<math>\mathbf{B}=\mu_0 (\mathbf{H}+\mathbf{M})=\mu_0 (1 + \chi_m)\mathbf{H}<math>
where μ is the permeability, measured in henrys per metre B is the magnetic flux density (also called the magnetic induction) in the material, measured in teslas H is the magnetic field strength, measured in amperes per metre
Absolute permeabilityAbsolute permeability is represented by the symbol μ0 and is the permeability of the vacuum, where μ0 = 4π × 10−7 N A−2 (exactly). Together with permittivity, permeability defines the speed of light. Relative permeabilityRelative permeability, sometimes denoted by the symbol μr, is the ratio of the permeability of a specific medium to the permeability of free space μ0:
SI magnetism units
ca:permeabilitat de:Permeabilit酹 (Magnetismus) ja:透磁率 sl:magnetna permeabilnost |
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