Magnetism Question 224
Question: Assume that each iron atom has a permanent magnetic moment equal to 2 Bohr magnetrons (1 Bohr magnetos $ =9.27\times {{10}^{-24}},A-m^{2} $ ). The density of atoms in iron is $ 8.52\times 10^{28},atoms/m^{3}. $ Find the maximum magnetic moment per unit volume.
Options:
A) $ 1.5\times 10^{2},A/m $
B) $ 1.58\times 10^{6},A/m $
C) $ 1.2\times 10^{5},A/m $
D) $ 1.3\times 10^{6},A/m $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] The total magnetic moment per unit volume. $ =\frac{(8.52\times 10^{28})\times (2\times 9.27\times {{10}^{-24}})}{1} $
$ =1.58\times 10^{6},A/m $
BETA
