Question 92: 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: