1
Question
The variation of magnetic susceptibility χ with absolute temperature T, for a ferromagnetic material, is best shown by which of the following graphs?
The variation of magnetic susceptibility χ with absolute temperature T, for a ferromagnetic material, is best shown by which of the following graphs?
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Solution
The correct option is D
The dependence of magnetic susceptibility with temperature for a ferromagnetic substance is given by,
χ=CT−Tc
Where,
C= material-specific Curie constant
From the above equation, we can infer that χ is inversely proportional to the absolute temperature.
So, as temperature increases, magnetic susceptibility decreases.
The relation is not linear, rather it is rectrangular hyperbola-like relation.
Moreover, the law also predicts a singularity in the susceptibility at T=Tc
Hence, option (C) is the correct answer.
Why this Question?
Key point: The dependence of magnetic susceptibility with temperature for a ferromagnetic substance is given by,
χ=CT−Tc
Where,
C= material specific Curie constant
χ= magnetic susceptibility of the material
Tc= Curie's temperature(in Kelvin)
The dependence of magnetic susceptibility with temperature for a ferromagnetic substance is given by,
χ=CT−Tc
Where,
C= material-specific Curie constant
From the above equation, we can infer that χ is inversely proportional to the absolute temperature.
So, as temperature increases, magnetic susceptibility decreases.
The relation is not linear, rather it is rectrangular hyperbola-like relation.
Moreover, the law also predicts a singularity in the susceptibility at T=Tc
Hence, option (C) is the correct answer.
| Why this Question? Key point: The dependence of magnetic susceptibility with temperature for a ferromagnetic substance is given by, χ=CT−Tc Where, C= material specific Curie constant χ= magnetic susceptibility of the material Tc= Curie's temperature(in Kelvin) |
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