What happens when a magnet is brought nearer to an iron rod floated on water or suspended by a string from its center? Try to perform this activity and note down your observation.
The rod tends to line up in a north-south direction. The tip which points to the geographic north is called north pole, and the tip which points to the geographic south is called south pole.
When two magnets are brought nearer to each other, like poles repel each other and opposite poles attract each other. An object that contains iron but is not itself magnetized (that is, it shows no tendency to point north or south) is attracted by either pole of a permanent magnet. This is the attraction that acts between a magnet and the unmagnetized steel door of a refrigerator.
When iron filings are sprinkled on a sheet of glass placed over a short bar magnet, a pattern is obtained. A similar pattern of iron filings is observed around a current carrying solenoid.
The rod tends to line up in a north-south direction. The tip which points to the geographic north is called north pole, and the tip which points to the geographic south is called south pole.
When two magnets are brought nearer to each other, like poles repel each other and opposite poles attract each other. An object that contains iron but is not itself magnetized (that is, it shows no tendency to point north or south) is attracted by either pole of a permanent magnet. This is the attraction that acts between a magnet and the unmagnetized steel door of a refrigerator.
When iron filings are sprinkled on a sheet of glass placed over a short bar magnet, a pattern is obtained. A similar pattern of iron filings is observed around a current carrying solenoid.
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