How do we differ an ordinary (non magnetic) steel/metal from the magnetic one?Note that we are not allowed to use any helping tools to identify the magnetic capability of the material, that includes breaking the metal with the aim of looking for the magnetic directions.The question was given on today‘s lecture, the students must look for the answer by themselves.Thanks in advance. Sorry if my question is not clear, English is not my native language.
This is from the link: Take a rod and touch with its end the middle of the second rod. If they move closer to one another, then you have a magnet in your hand. The real magnet has a magnetic field at its poles, but not in its center. So, as mentioned earlier, if you take the iron bar and touch its tip to the magnet's center the iron bar will not be attracted. This assumes that the magnet's poles are at its ends.
It is difficult, because the unmagnetized magnets look like ordinary metal. If you have one or two strong Neodymium Magnets, you can try to magnetized the metal, and you can find if the metal can be magnetized. I have tried to use Neodymium Magnets to magnetized 1 small alnico magnet, it works. :) We also will use SmCo Magnet to orient the Alnico magnet during heat treatment for some special request, but it is not a common method. It is very interesting. We supply magnets, but we are professional on Alnico magnets. I just can say something I know which we have a test. :)
