Question
Download Solution PDFIn case of magnetic circuits, the ratio of the flux density developed in the magnetic material to the flux density developed in air, for the same amount of magnetising force applied to it, is called _________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The relative permeability (μr) of a substance is the ratio of the magnetic permeability (μ) of the substance to the permeability of free space (μ0)
\({\mu _r} = \frac{\mu }{{{\mu _0}}}\)
Hence, it is a dimensionless quantity and is equal to 1 for a vacuum.
Additional Information
|
Material |
Magnetic Susceptibility (Xm) |
Relative Permeability (Km = 1 + Xm) |
Magnetic Permeability (μm = Kmμ0) |
|
Diamagnetic |
-10-5 to -10-9 |
< 1 |
μm < μ0 |
|
Paramagnetic |
10-5 to 10-3 |
> 1 |
μm > μ0 |
|
Ferromagnetic |
≫ 1 |
≫ 1 |
μm ≫ μ0 |
Last updated on Jun 16, 2025
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