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Question
You are given two similar bars. One is a magnet and the other is of soft iron. How will you distinguish and identify them ?
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Solution
Take first bar and suspend it in a stand with the help of a thread. So that it is free to rotate in horizontal plane. Note the direction in which it sets itself. If the direction is North and South it may be magnet. Again rotate it, if this time again it sets itself in north and south direction, it is a magnet, otherwise it is iron.
Now repeat above experiment with second bar and in the same way find it if it sets always in north and south direction then it will be a magnet.
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RELATED QUESTIONS
Answer the following.
Why is it not possible to isolate a single magnetic pole?
Define the following term regarding a bar magnet:
Magnetic field
Define the following term regarding a bar magnet:
Magnetic axis
If a magnet is carefully broken into two pieces as shown in figure (i), how does the magnetic strength of each piece compare with that of the original magnet? If another magnet is carefully broken in half along its long axis shown in figure (ii), how would the strength of each piece compare with that of the original magnet?
Define the term Poles of a magnet
Define the following term:
Angle of declination
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Not attraction but repulsion is a sure test of magnetism.
State the laws of magnetism.
Thamizh Dharaga and Sangamithirai were playing with a bar magnet. They put the magnet down and it broke into four pieces. How many poles will be there?
The pole of a freely suspended magnet that points towards the north is called the south pole and what points towards the south is the celled north pole.
