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प्रश्न
Which magnet will you use?
You are lost in a forest.
उत्तर
A bar magnet or loadstone can be used to find the direction in the forest. This is because a bar magnet, when suspended freely, always rests in a north-south direction.
संबंधित प्रश्न
How will you test whether a given rod is a magnet or not ?
Match the following
| Column A | Column B |
| A) Steel | 1) to store magnets |
| B) Soft iron | 2) temporary magnet |
| C) Use in electric bell | 3) permanent magnet |
| D) Magnetic keepers | 4) electromagnet |
Answer the following in detail.
How can a magnet be demagnetized?
Write the answer in your word.
Write the properties of a magnet.
Fill the blank spaces in the table given below:
| Nature of bar | Action of compass needle | |
| North Pole | South Pole | |
| Non-magnetic | No action | ________ |
| ________ | attracted | attracted |
| North pole of a bar magnet | ________ | _________ |
| ________ | attracted | repelled |
There are two knitting needles. One of them is magnetized. How will you find out which one is magnetized, if no other magnet is available?
The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:
- Angle of declination
- Angle in dip
Define the term Poles of a magnet
What is a neutral point?
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
