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प्रश्न
Answer the following in detail.
Distinguish between a temporary magnet and a permanent magnet.
उत्तर
Temporary magnet
- These magnets retain their magnetic property for a short duration of time.
- These are made of soft iron.
- They lose their magnetic properties once the magnetizing force is removed.
Permanent magnet
- These magnets retain their magnetic property always.
- These are made of iron, steel, cobalt, nickel, or an alloy callçd ANILCO.
- They retain their magnetic properties even after the magnetizing force is removed.
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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 .................
Describe the method by which an iron bar can be made a magnet.
State three differences between the temporary and permanent magnets.
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.
Give a reason for the following.
Electromagnets are temporary magnets.
It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.
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 |
