Magnetism is a form of
energy:
Magnetic energy can not be seen, heard or tasted, toched or nor has
a smell. This energy can do work for us. It can magntize other material,
lift material and can procude electricity by applying mechanical
movements.
Magnetic & non-megnetic materials:
Iron is a good magnetizing material. Soft steel, nickel, cobalt and
newly developed ceramic has excellent magnetic properties. Temporaray
magnets are made from iron, they hold magnetic properties only till
magnetic force is within. Permanent magnets means which holds the magnetc
property indefinitely.
Glass, paper,wood,rubber.plastic,cotton etc are called non-magnetic
material and they can not be magnetized. Although these materials do not
get magnetized, they are transperant to these energy means, magnetic line
of force can pass through these substances.
Bases of magnetism is that explained in
atom structure
we learned earlier.hese
atms are belived to be tiny magnets (Magnetic dipoles) with a north and a
south pole. |