Doubt regarding definition of magnetic susceptibility

[hale2bopp]

Intensity of magnetisation(I) is defined as the magnetic moment per unit volume of the material. It represents the extent to which a specimen is magnetised.

I=M/V

Magnetising force or magnetising intensity(H) is defined as the number of ampere turns flowing round unit length of toroidal solenoid to produce the magnetic induction B, in the solenoid.
It represents the degree to which a magnetic field can magnetise a material.

H=nI

Magnetic susceptibility (Xm) of materials is defined as the ratio of intensity of magnetsiation of that material to the magnetising intensity of the magnetic field.
It represents the ease with which a specimen can be magnetised.

Xm=I/H

My question is, according to the definitions and what they represent, of I and H, if I and H are large, doesn't it mean that the extent to which the specimen is magnetised , and the degree to which a magnetic field can magnetise the specimen, are more? In that case, that would make magnetic susceptibility more since the specimen can be more easily magnetised. Then how come according to the formula, is H is more, Xm is less? Is there something missing in the definition, or something wrong in my understanding?

 

[Naty1]

In that case, that would make magnetic susceptibility more since the specimen can be more easily magnetised.

I don't think this statement is accurate: [What is your source? ]

It represents the degree to which a magnetic field can magnetise a material.

 

[hale2bopp]

These definitions and what they represent, were copied out of my school textbook. It seems to me, that the definitions and what they represent, are contradicting the mathematical definition. So is what they have written as 'what the quantities represent', wrong?

 

[Naty1]

Rereading your definitions, I'm not at all sure my prior post is correct...


Try these Wikipedia articles and compare descriptions with your own textbook ...see what conclusions you draw..

http://en.wikipedia.org/wiki/Magnetic_permeability


http://en.wikipedia.org/wiki/Magnetizing_field#Magnetic_pole_model_and_the_H-field

 

[sardar]

I can understand your confusion about the definition of magnetic susceptibility and its relationship to intensity of magnetization (I) and magnetizing force (H). However, there are a few key points to consider in order to better understand this concept.

First, it's important to note that the intensity of magnetization (I) and the magnetizing force (H) are not independent variables. They are related through the equation I=M/V, where M is the magnetic moment and V is the volume of the material. This means that as the magnetizing force increases, the intensity of magnetization also increases, but at a slower rate. This is because as the magnetic field gets stronger, it becomes more difficult to magnetize the material further.

Next, the magnetic susceptibility (Xm) is a measure of how easily a material can be magnetized. This means that as the intensity of magnetization (I) increases, the magnetic susceptibility (Xm) decreases. This is because as the material becomes more magnetized, it becomes harder to magnetize it further.

In summary, the relationship between I, H, and Xm is not a linear one. As both I and H increase, Xm decreases because it becomes more difficult to magnetize the material further. Therefore, there is nothing missing in the definition or wrong in your understanding. It's simply a matter of understanding the relationship between these variables and how they affect each other. I hope this helps clarify your doubts regarding the definition of magnetic susceptibility.