Question
Download Solution PDFA susceptibility of a certain magnetic material is 400. What is the class of the magnetic material?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- The magnitude of the internal polarization (J) divided by the strength of the external field (B) is called Magnetic susceptibility.
- It is denoted by Greek letter chi (χ).
- Based on magnetic property materials are of 4 types:
- Diamagnetic
- Paramagnetic
- Superparamagnetic
- Ferromagnetic
EXPLANATION:
- Below table shows Magnetic Susceptibility χ for different materials:
|
Material |
Magnetic Susceptibility |
Examples |
|
Diamagnetic |
-10 |
Water, Most biological substances |
|
Paramagnetic |
+1 |
Molecular O2, Simple salts |
|
Ferromagnetic |
high value |
Iron, Steel |
- Given that magnetic material is 400.
- This is a higher value. Comparing to the values in the table the material will be Ferromagnetic.
- So, the answer will be option 3.
Important Points
The susceptibility of ferromagnetic material is Large and positive. Ferromagnetic materials follow the Curie – Weiss law. When ferromagnetic substance heated above Curie temperature (Tc)
\(i.e.\chi \propto \frac{1}{{T - {T_C}}}\)
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