Definition of Volume Susceptibility
-
- See also Relative permeability.
The volume magnetic susceptibility, represented by the symbol (often simply, sometimes — magnetic, to distinguish from the electric susceptibility), is defined in the International System of Units — in other systems there may be additional constants—by the following relationship,
where
- M is the magnetization of the material (the magnetic dipole moment per unit volume), measured in amperes per meter, and
- H is the magnetic field strength, also measured in amperes per meter.
The magnetic induction B is related to H by the relationship
where μ0 is the magnetic constant (see table of physical constants), and is the relative permeability of the material. Thus the volume magnetic susceptibility and the magnetic permeability are related by the following formula:
- .
Sometimes an auxiliary quantity, called intensity of magnetization (also referred to as magnetic polarisation J) and measured in teslas, is defined as
- .
This allows an alternative description of all magnetization phenomena in terms of the quantities I and B, as opposed to the commonly used M and H.
Read more about this topic: Magnetic Susceptibility
Famous quotes containing the words definition of, definition and/or volume:
“Im beginning to think that the proper definition of Man is an animal that writes letters.”
—Lewis Carroll [Charles Lutwidge Dodgson] (18321898)
“Beauty, like all other qualities presented to human experience, is relative; and the definition of it becomes unmeaning and useless in proportion to its abstractness. To define beauty not in the most abstract, but in the most concrete terms possible, not to find a universal formula for it, but the formula which expresses most adequately this or that special manifestation of it, is the aim of the true student of aesthetics.”
—Walter Pater (18391894)
“Bishop Berkeley destroyed this world in one volume octavo; and nothing remained, after his time, but mind; which experienced a similar fate from the hand of Hume in 1737.”
—Sydney Smith (17711845)