Fun With Magnets

POLES OF MAGNET

Example1:
The magnetic effects are not same throughout the magnet .What would happen if we dip a magnet into a box of paper clips? most of the clips would stick to the ends of a magnet as shown in the fig.
This shows that the strongest effects are near the ends of a magnet. each end of the magnet is a magnetic pole.As you see magnetic poles are points on a magnet are have opposite magnetic qualities.
         
                 
Example2:
We begin our study by examining iron filings sprinkled on a sheet of glass placed over a short bar magnet. The arrangement of iron filings is shown in Fi
The pattern of iron filings suggests that the magnet has two poles similar to the positive and neg ative charg e of an electric dipole. As mentioned in the introductory section, one pole is designated the North pole and the other, the South pole. When suspended freely, these poles point approximately towards the geographic 

FINDING DIRECTION
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.north and south poles,respectively.
          
         
(i) There is a repulsive force when north poles ( or south poles ) of two magnets are brought close together. Conversely, there is an attractive force between the north pole of one magnet and the south pole of the other.

 

(ii) We cannot isolate the north, or south pole of a magnet. If a bar magnet is broken into two halves, we get two similar bar mag nets with somewhat weaker properties. Unlike electric charges, isolated magnetic north and south poles known as magnetic monopoles do not exist.

MAKE YOUR OWN MAGNET
There are several methods of making magnets. Let us learn the simplest one.
Take a rectangular piece of iron. Place it on the table. Now take a bar magnet and place one of its poles near one edge of the bar of iron. Without lifting the bar magnet, move it along the length of the iron bar till you reach the other end.
Now, lift the magnet and bring the pole(the same pole you started with) to the same point of the iron bar from which you began . Move the magnet again along the iron bar in the same direction as you did before. Repeat this process about 30-40 times. 
Bring a pin or some iron filings near the iron bar to check whether it has become a magnet.If not, continue the process for some more time. Remember that the pole ofthe magnet and the direction of its movement should not change. You can also use an iron nail, a needle or a blade and convert them into a magnet.