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प्रश्न
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
उत्तर
Using the approach below, you can make a magnetic compass.
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On a wooden table, place one needle.
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Move a magnet along the length of the needle without raising it.
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When you reach the needle's endpoint, raise the magnet and rub it in the same way again.
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Keep going in the same direction as before and repeat the steps.
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Now, in a water-filled container, set the needle on the cork.
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The needle will change and position itself in the "North-South" way.
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संबंधित प्रश्न
Distinguish between
Magnetic and non-magnetic materials.
Write main properties of a magnet.
Write two methods by which a magnet can be demagnetised.
Few iron nails and screws got mixed with the wooden shavings while a carpenter was working with them.How can you help him in getting the nails and screws back from the scrap without wasting his time in searching with his hands?
Paper is not a ______ material.
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Affect observed in each case is stated in Column I. Possible reasons for the observed affects are mentioned in Column II.
Match the statements given in Column I with those in Column II.
| Column I | Column II |
| Boat gets attracted towards the magnet | Boat is fitted with a magnet with north pole towards its head |
| Boat is not affected by the magnet | Boat is fitted with a magnet with south pole towards its head |
| Boat moves towards the magnet if north pole of the magnet is brought near its head | Boat has a small magnet fixed along its length |
| Boat moves away from the magnet when north pole is brought near its head | Boat is made of magnetic material |
| Boat floats without changing its direction | Boat is made up non-magnetic material |
Analogy:
Magnetic substance: Attracted by magnets
Non-magnetic substance: ______.
Among the following which one is a magnetic substance?
What are magnetic substances?
A toy car has a bar magnet laid hidden inside its body along its length. Using another magnet how will you find out which pole of the magnet is facing the front of the car?
