Why are some iron objects magnetic and some others not magnetic?

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It all depends on the way in which the iron's 'domains' are aligned. Iron is inherently magnetic as a material, but can become demagnetized as time goes on, due to sudden impact or when affected by another magnetic source. For iron to become magnetized 'domains' need to be in parallel with each other so the magnetic field created all flows in the same direction. An unmagnetized iron source has all of its domains misaligned A brief explanation of domains are a series of positive and negative charged atomic particles within the iron itself which behaves much like tiny magnets themselves.
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Why do some pieces of iron behave as magnets while others do not?

Iron Magnatized \n. \nThe "magnitized" iron will have domains aligned to Earth's magnetic field. These magnitized iron will have poles and act like magnets. \nSome other ir

Why are some iron objects magnetic and others not magnetic?

If the iron atoms are aligned then the object is magnetic, if they are randomly oriented then it is not. How the object was manufactured may be the cause of the difference

Does an iron object have to touch a magnet to become a temporary magnet?

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Why are some pennies magnetic and others not?

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