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magnetic susceptibility
The relative permeability (i.e. the ratio of the magnetic permeability of a medium to that of a vacuum), minus one: Χm = μr - 1.
Magnetic susceptibility (also called susceptibility) measures the degree of magnetization of a material in response to an applied magnetic field. It is positive for a paramagnetic or ferromagnetic material and negative for a diamagnetic material. Χm is a dimensionless (unitless) quantity.
Related category
• ELECTRICITY AND MAGNETISM
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