Dictionary:Magnetic permeability

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The ratio of the magnetic induction to the inducing field strength ; denoted by the symbol :

where is the permeability of free space Wb/Am or H/m in SI system, and 1 gauss per oersted in the cgs system with the permeability ; dimensionless. The quantity is sometimes considered the permeability (especially in the cgs system). See Figure M-1.