Question 91: Magnetism and Matter

Question

A paramagnetic material has 10
28
atoms/m
3
. Its magnetic susceptibility at temperature 350 K is 2.8 $ 	imes $ 10
–4
. Its susceptibility at 300 K is :

Accepted Answer

x $\alpha $ ${1 \over {{T_C}}}$
curie law for paramagnetic substane
${{{x_1}} \over {{x_2}}}$ = ${{{T_{{C_2}}}} \over {{T_{{C_1}}}}}$
${{2.8 	imes {{10}^{ - 4}}} \over {{x_2}}} = {{300} \over {350}}$
x
2
= ${{2.8 	imes 350 	imes {{10}^{ - 4}}} \over {300}}$
= 3.266 $ 	imes $ 10
$-$4

Answer

3.726 $ 	imes $ 10
–4

Answer

2.672 $ 	imes $ 10
–4

Answer

3.672 $ 	imes $ 10
–4

Answer

3.267 $ 	imes $ 10
$-$4

Magnetism and Matter

A paramagnetic material has 10 28 atoms/m 3 . Its magnetic susceptibility at temperature 350 K is 2.8 \times 10 –4 . Its susceptibility at 300 K is :

Choose the correct answer: