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प्रश्न
State three differences between the temporary and permanent magnets.
उत्तर
Temporary magnet
- It is made up of soft iron.
- The magnet which loses its magnetism as soon as magnetising force is removed away from it.
- Because of its weak power, it is not used to make the iron pieces into the magnet.
Permanent magnets
- It is made up of steel, cobalt, and nickel.
- The magnet, which does not lose its magnetic properties easily is called a permanent magnet.
- It can convert an ordinary piece of iron into a temporary magnet.
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संबंधित प्रश्न
Write true or false of the following statement.
Artificial magnets are weaker than the natural magnets.
Write true or false of the following statement.
Permanent magnets get easily demagnetised.
Fill in the blank.
Temporary magnets are usually made up of .................
Select the correct answer
Making a magnetic substance a magnet by bringing it closer to another magnet without touching it, is
What are natural and artificial-magnets?
Name the material of the core of an electromagnet for temporary magnet.
Tick the most appropriate answer.
Temporary magnets are made of
State if the following statement is true or false. Correct the statement if it is false.
Temporary magnets are made of cobalt.
Write true or false of the following statement.
Single touch method is better than the electrical method for making a magnet.
Column I shows different positions in which one pole of a magnet is placed near that of the other. Column II indicates the resulting action between them for each situation. Fill in the blanks.
| Column I | Column II |
| N - N | ______ |
| N - ______ | Attraction |
| S - N | ______ |
| ______ - S | Repulsion |
