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प्रश्न
Answer the following in detail.
How can a magnet be demagnetized?
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उत्तर
A magnet can be demagnetized in the following ways :
- rough handling
- hammering the magnet several times.
- passing an alternating current around the magnet.
- dropping the magnet on the floor several times.
- heating the magnet to a very high temperature.
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संबंधित प्रश्न
“Poles exist in pair”. Comment on this statement ?
State if the following statement is true or false. Correct the statement if it is false.
Whenever a magnet is not in use, it should be stored along with other magnets.
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.
Write the answer in your word.
Write the properties of a magnet.
Draw a clearly labelled diagram, to show how a steel bar is magnetised by a divided touch method. A written description is not required.
Distinguish between
Natural and artificial magnets.
Which is not attracted by a magnet?
Observe the pictures A and B given in figure carefully.
Which of the following statement is correct for the above given pictures?
Match the following:
| 1. | Electricity and magnetism | a. | Step-down transformer |
| 2. | Force on the conductor | b. | Hans Christian Oersted |
| 3. | Electric bell | c. | I LB |
| 4. | Ns <Np | d. | Electromagnet |
