In the present chapter, we take a look at magnetism as a subject in its
own right Some of the commonly known ideas regarding magnetism are:
(i)
The earth behaves as a magnet with the magnetic field pointing
approximately from the geographic south to the north (ii) When a bar magnet is freely suspended, it points in  the north-south
direction The tip which points to the geographic north is called the
north pole and the tip which points to the geographic south is called
the south pole of the magnet