Iron, steel, nickel and cobalt are magnetic materials. They are affected by the magnet and are attracted by either pole of the magnet. Permanent magnets are usually made of magnetic materials such as iron. Permanent magnets always produce force on other magnets or magnetic materials. The main feature of a permanent magnet: it produces its own magnetic field. The magnetic field cannot be turned on and off-bar magnets and horseshoe magnets have always been examples of permanent magnets. Induction magnets are like permanent magnets, and induction magnets become magnets only when placed in a magnetic field. When the magnet is removed from the magnetic field, the inductive magnetic field is quickly lost. When the iron chip is close to the bar magnet, the iron chip in the image becomes an induction magnet. Like all induction magnets, when they are removed from the magnetic field, they lose most or all of their magnetic properties. The bar magnetic test of iron filings that are attracted to permanent magnets of magnetic steel can: attract or reject another permanent magnet to attract magnetic materials ( But not excluding it) This means that you can only show that an object is a permanent magnet by checking if it repels another magnet.