vacuum

Permeability of a nonmagnetic medium is defined as being equal to the permeability of a vacuum, which is approximately 4π x 10^-7 H/m. This means that nonmagnetic materials do not enhance or diminish the magnetic field passing through them.

Relative permeability does not have a unit as it is a dimensionless quantity that describes how easily a fluid can flow through a porous medium (such as a rock or soil) relative to the fluid's flow in a vacuum. It is typically represented as a dimensionless ratio ranging from 0 to 1.

Relative permeability is a measure of a material's ability to become magnetized when exposed to a magnetic field relative to a vacuum. Stainless steel typically has a relative permeability close to 1, meaning it is not easily magnetized. However, certain types of stainless steel with specific compositions or treatments may exhibit slightly higher relative permeability.

permeability