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प्रश्न
State three important uses of a magnet.
संक्षेप में उत्तर
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उत्तर
Use of magnet:
- Magnets are used in magnetic compass, doorbells, refrigerators.
- Magnets are used in dynamos, motors, loudspeakers, microphones, etc.
- Ceramic magnets are used in computers.
- Magnets are used in toys to give magic effects.
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संबंधित प्रश्न
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 |
Define the following term regarding a bar magnet:
Magnetic axis
If a bar magnet is hung by a thread tied at its center, its north pole becomes steady in the direction of the ______ Pole of the earth.
Select the correct option:
The place around a magnet where its influence can be detected is called:
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 |
State three important properties of a magnet.
Define the following term:
Magnetic meridian
With the help of a diagram explain the following:
Magnetisation of an iron bar by a single touch method.
Distinguish between
Natural and artificial magnets.
The south pole of a bar magnet and the north pole of a U-shaped magnet will _______.
