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:
“Although there is no universal agreement as to a definition of life, its biological manifestations are generally considered to be organization, metabolism, growth, irritability, adaptation, and reproduction.”
—The Columbia Encyclopedia, Fifth Edition, the first sentence of the article on “life” (based on wording in the First Edition, 1935)
“Although there is no universal agreement as to a definition of life, its biological manifestations are generally considered to be organization, metabolism, growth, irritability, adaptation, and reproduction.”
—The Columbia Encyclopedia, Fifth Edition, the first sentence of the article on “life” (based on wording in the First Edition, 1935)
“The other 1000 are principally the ‘old Yankee stock,’ who have lost the town, politically, to the Portuguese; who deplore the influx of the ‘off-Cape furriners’; and to whom a volume of genealogy is a piece of escape literature.”
—For the State of Massachusetts, U.S. public relief program (1935-1943)