Iron becomes magnetized more easily than other materials but it also loses its magnetism easily so that magnets concentrates of soft irons are called temporary magnet magnets made by steel alloys hold their magnetism for an iron period of time e and are called permanent magnets. 

Magnetism in a magnet is concentrated at two-point, usually at the ends of the magnets. these points are called “poles” of the magnets - one called the “north poles” and the other is called "south poles" .the north pole is at the end of the magnet which would point north if the magnet swing freely, and the south pole is the opposite end.  

magnet is made in various shapes,  sizes, and strengths.   permanent magnets are usually made of a bear of steel alloys, eighter straight with poles at the ends, or bent in the shape of a familiars horseshoe with poles on the opposite side of the opening.

  Magnetism is an invisible force and can be seen only in terms of the effects it produces. you know that the wind, for example,  provides the tremendous force, yet it is invisible.  similarly, the magnetic force may be felt but not seen.  

The magnetic field of magnets can best be explained by invisible lines of force leaving the magnets at one point and entering it at another. these invisible lines of force are referred to as “flex lines” and the shape of the area they occupy is called the "flex pattern". the number of flex lines pr squire inches is called the "flux density". the points at which the flux lines leave or enter the magnet are called "poles".the magnet circuit is the path taken by the magnet line of force.

if you were to bring the two magnets together with the north poles facing each other, you would feel a force of repulsion between the poles. brining the south pole together would also result are repulsion but, if a north pole is brought near a pole, a force of attraction exists. in this respect, magnetic poles are very much like static charges.  likes charge or poles repercussion each other and unlike charges or poles attract. that

The action of the magnetic in attracting and repelling each other is due to the magnetic field around the magnets. as has already been explained, the invisible magnetic field is represented by lines of force that leave a magnet at the north pole and enter it at the south pole. inside the magnet, the line travel south poles to the north poles so that a line of force is continuous and unbroken.