Question
Download Solution PDFWhich one of the following is a ferromagnetic material?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFerromagnetic Substances: The substances which are strongly magnetized when placed in an external magnetic field in the same direction to the applied field are called ferromagnetic substances.
Example: Iron, nickel, cobalt
Properties:
- These are characterized by parallel alignment of magnetic dipoles
- These substances are strongly attracted by a magnet
- It develops strong magnetization in the direction of the applied magnetic field
- By removing magnetizing filed, it does not lose its magnetization
- Magnetic susceptibility is much greater than 1
- Relative permeability is much greater than 1
- Magnetic permeability is much larger compared to free space
|
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 |
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