Fun with Magnets

13.1 Magnetic and Non-Magnetic Materials

Magnets are the object that attracts the irons to stick with that. Magnetite contains iron. The substances having the property of attracting iron are now known as magnets.

The natural magnets were discovered so such rocks were given the name magnetite, Later on the process of making magnets from pieces of iron was discovered. These are known as artificial magnets.

The materials which get attracted towards a magnet are magnetic − for example, iron, nickel or cobalt. The materials which are not attracted towards a magnet are non-magnetic.

13.2 Poles of Magnet

There are two ends of a bar magnet. The ends are said to be pole. Poles of a magnet are said to be near these ends.

13.3 Finding Directions

The statue had an interesting property of magnet. It would rest in such a position that its extended arm always pointed towards South.

Use the direction of the rising sun in the morning to find out the rough direction towards east, where we are doing this experiment. If you stand facing east, to your left will be North. Using the Sun for finding directions may not be very exact, but, it will help to make out the direction North from the South, on your line.

The end of the magnet that points towards North is called its North seeking end or the North pole of the magnet. The other end that points towards the South is called South seeking end or the South pole of the magnet. All magnets have two poles whatever their shape may be. Usually, north (N) and south (S) poles are marked on the magnets.

13.4 Make your Own Magnet

There are several methods of making magnets.

Take a iron rod and move it on the magnet again along the iron bar in the same direction as. 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.

13.5 Attraction and Repulsion between Magnets

The property of the magnets can also be observed by suspending a magnet and bringing one by one the poles of another magnet near it.

Magnets loose their properties if they are heated, hammered or dropped from some height Also, magnets become weak if they are not stored properly.

Keep magnets away from cassettes, mobiles, television, music system, compact disks (CDs) and the computer.