Magnet

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The ends of a magnet are called poles.Every magnet has two poles, the North poles(N) and the South poles(S).


Same poles repel each other. Different poles attract each other.

Magnets have different shapes and sizes.

Bar magnet

ring magnet

horseshoe magnet

u shape magnet

circular magnet

cylindrical magnet

Handling Magnets

A magnet will become weak if it is knocked, heated or dropped.
It should be stored properly to keep their strength.
They should be kept in pairs with an iron keeper on both ends.

Magnetic objects

Objects that are attracted to a magnet are called Magnetic objects. They are made of iron.

iron nails

paper clips

   

spoon

screw

key

razor blade

Objects that are not attracted to a magnet are called Non-Magnetic objects.

eraser

gold ring

towel

slipper

Strengths of Magnets

Different magnets have different strengths. The strength of a magnet does not depends on its size and shape. Same big magnets can be weak but some small Magnets can be strong. The strength of a magnet can be measured by counting teh number of objects that it can attract. A stronger magnet attracts more objects than a weaker magnet.

Uses of Magnets

Magnets are used in many things.


Refrigerator - to keep the door tightly closed.
Chess - to keep the Chess pieces stick on the chessboard
Compass - to show directions.
Handbag - to keep the bag closed.
Crane - to lift the heavy objects.
Pencil bos - to keep the cover closed.