Magnetic Permeability Of Free Space

It is defined to have the exact value of 4π x 10 7 n a 2 newtons per ampere squared.

Magnetic permeability of free space. As of may 20 2019 the vacuum permeability μ0 is no longer a defined constant but rather needs to be. It derived by producing a magnetic field in a vacuum. It is represented by u 0 b 0 h the ratio of magnetic intensity in a vacuum and magnetising field. The permeability of free space is also called the vacuum permeability or a magnetic constant.

The magnetic constant can be defined as the the value of magnetic permeability in a classical vacuum. The physical constant μ0 commonly called the vacuum permeability permeability of free space permeability of vacuum or magnetic constant is the magnetic permeability in a classical vacuum. The permeability of free space µ0 the permeability constant or the magnetic constant is µ0 4π 10 7 h m 1 257 10 6 h m n a2. The relative permeability μr is then defined as the ratio μ μ0 which is dimensionless.

Thus the relative permeability of free space or vacuum is 1. Materials may be classified magnetically on the basis of their permeabilities. Permeability of free space also known as the permeability of free space air or vacuum. A diamagnetic material has a constant relative permeability slightly less than 1.

It is symbolized µ o. Vacuum permeability is derived from production of a magnetic field by an electric current or by a moving electric charge and in all other formulas for magnetic field production in a vacuum. The permeability constant μ 0 also known as the magnetic constant or the permeability of free space is a measure of the amount of resistance encountered when forming a magnetic field in a classical vacuum. The permeability of free space a vacuum is a physical constant equal to approximately 1 257 x 10 6 henry per meter.

Until 20 may 2019 the magnetic constant had the exact defined value μ 0 4 π 10 7 h m 12 57 10 7 h m. 1 it is connected to the energy stored in a magnetic field see hyperphysics for specific equations. It is represented using the symbol μ 0.