Magnets can be natural or artificial, or permanent or temporary. A natural magnet is a mineral with magnetic properties (magnetite). An artificial magnet is a body of ferromagnetic material to which the property of magnetism has been communicated. A permanent magnet is made of magnetized steel.
The magnetic field is strongest at the center and weakest between the two poles just outside the bar magnet. The magnetic field lines are densest at the center and least dense between the two poles just outside the bar magnet.
