Physics
Describe an experiment to illustrate that like poles repel while unlike poles attract.
Magnetism
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Answer
Experiment :
Take two bar magnets A and B. Suspend one magnet A with a silk thread from a support so that it is free to swing. The magnet will come to rest in the north-south direction. The north pole of the magnet is in the north direction and the south pole of the magnet is in the south direction.
Now holding the other magnet B in your hand, bring its north pole near the north pole of the suspended magnet A (such that the two magnets do not touch each other) as shown in below figure (a). It is observed that the suspended magnet A moves away from the magnet B. This shows that like poles repel each other.
- Now bring the south pole of the magnet B near the north pole of the suspended magnet A as shown in below figure (b), without touching it. It is observed that the magnet A moves towards the magnet B. This shows that unlike poles attract each other.
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