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Question
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
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Solution
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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RELATED QUESTIONS
Distinguish between
Magnetic and non-magnetic materials.
Write main properties of a magnet.
Write two methods by which a magnet can be demagnetised.
The Materials which are attracted towards the magnet are called ______.
Circle the odd ones and give reason
Write down the names of substances.
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 |
______ made objects are attracted by magnets.
Analogy:
Magnetic substance: Attracted by magnets
Non-magnetic substance: ______.
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?
