The word magnet is derived from
the name of an island in Greece called magnesia where magnetic ore
deposits were found, as early as 600 BC In the previous chapter we have learned that moving charges or electric
currents produce magnetic fields This discovery, which was made in the
early part of the nineteenth century is credited to Oersted, Ampere, Biot
and Savart, among others In the present chapter, we take a look at magnetism as a subject in its
own right