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Question

At a temperature of 30C, the susceptibility of a ferromagnetic material is found to be x. its susceptibility at 333C is

A
x
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B
0.5x
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C
2x
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D
11.1x
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Solution

The correct option is A x
Given, T1=30C=273+30=303K

T2=333C=273+333=606K

According to Curie's law,

χm=μ0CT

Where C is curie constant and T is the absolute temperature.

χm1T

χm1χm2=T2T1=606303=2

χm2=χm12=0.5x

(χm1=x)

Hence, option (A) is the correct answer.

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