Shown on the right are the magnetic domains of, some iron bar magnet, and the ta

Question

Shown on the right are the magnetic domains of, some iron bar magnet, and the table below gives the magnitude of the magnetization of each domain. What is the magnitude and direction of the total magnetization of the bar magnet? Right Up A/m O Down Left The bar magnet is now heated to a temperature high enough that the orientation of each atom in the bar changes. The bar is then cooled back down to its original temperature. What is the most likely magnitude of the total magnetization now? Zero 3 A/m 5 A/m 6 A/m

Explanation / Answer

adding all the magnetization of each magnetic domains

right direction (a+e) - left direction(f) = a+e-f = 5+4-3 = 6(right direction)

down direction(b+d)- up direction (c) = b+d-c = 3+2-5 = 0 (no direction)

therefore , net magnetization= 6 A/m in right direction

if the magnet is heated high enough (above curie temperature) then it losses the magnetization property.

therefore magnetization = 0 A/m

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