Can unmagnetized steel be magnetized? Yes, all that is necessary is to line up the free electrons in all the atoms in a sample of steel or iron in the same direction. One way of magnetizing steel is to wrap the electric wire around the steel multiple times and then run a current through the [...]
How does a tool magnetizer and demagnetizer work? These things (pictured below). I get how the magnetizer works: a permanent magnet magnetises the tool bit, but how is the magnetic fields arranged in the demagnetizer in order to demagnetize tools? These things are unpowered completely passive blocks, presumaly containing a magnet and some iron/steel parts. [...]
