2. 1 )Magnets are the small pieces of metal which
have the power of attracting objects made of
iron.
2)A mag net is an iron object that makes pieces of
iron or steel moves towards it.
3)Now –a- days , we use mag nets for various
things
Iron pin holders
Door closer in fridges
Magnetic stickers
WHAT ARE MAGNETS?
3. There was a greek shepherd named
Magnes,one day,he found that the nails in
his shoes and the iron tip of the stick were
attracted to a certain spot on the ground.To
find the source of this mysterious
attraction, he started digging the
ground.Below the surface, he found some
stones that attracted the iron.It is believed
that natural magnets were discovered in
this way.
The greek story of magnets,
6. All materials that are attracted by a
magnet are called magnetic
materials.Iron .nickel ,cobalt and their
alloys and substances made up of
materials are examples of magnetic
materials .In other words ,a material
which has property of attracting iron
,objets made of iron like substance .
The substances not attracted by a
magnet is called non magnetic
materials,eg-wood .brassetc
Magnetic and non
magnetic materials
7. In every magnets there are 2 regions where
its magnetic strenght is maximum.these 2
regions or points of every magnet where its
magnetic power is maximum are called as
poles of a magnet.
Poles of a manet
8. If a magnet is divided into 2 parts,it
will form 2 magnets and both magnets
will have a north and a south pole.The
2 magnets can than be further divided
in same manner and all the resulting
pieces will have both north and south
pole.
Know the fact……….
9. Magnetite is a iron ore.
Magnets have the power to attract iron
The phenomenon of the attraction of a
substance by a magnet is called magnetism.
Magnets can be made artificially.
All magnets attracted by a magnet is called
magnetic substance
Ever7 magnet has 2 poles(N)&(S) .
Points to remember
