In this topic, you study Absolute Permeability.
The ratio of magnetic flux density (in tesla) in a particular medium (other than vacuum) to the magnetic field strength (in amperes/metre) at the same location producing that flux density is called the absolute permeability of that medium.
- It is also taken as the measure of the ease with which a magnetic flux permeates a medium or in other words, it is a measure of the receptiveness of the medium to having flux set up in it. The unit of absolute permeability (U) is henry per metre (H/m).
Thus,
or,
Absolute permeability, H henrys per metre
tesla
- The value of the absolute permeability is dependent on the nature of the medium. As already mentioned above, for the magnetic fields in air or non-magnetic materials, For ferromagnetic materials with non-linear relation between B and H as discussed later, the value of is not constant but varies considerably with the degree of magnetization (i.e. with the value of H).