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प्रश्न
Name the material of the core of an electromagnet for temporary magnet.
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उत्तर
They are made of soft iron.
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संबंधित प्रश्न
Write true or false of the following statement.
Artificial magnets are weaker than the natural magnets.
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
Give a reason for the following.
Electromagnets are temporary magnets.
Answer the following in detail.
Distinguish between a temporary magnet and a permanent magnet.
Write true or false of the following statement.
Single touch method is better than the electrical method for making a magnet.
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 |
You are given an iron strip. How will you make it into a magnet?
