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प्रश्न
Write true or false of the following statement.
Permanent magnets get easily demagnetised.
पर्याय
True
False
उत्तर
False.
Permanent magnets can not be demagnetised.
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संबंधित प्रश्न
Write true or false of the following statement.
Artificial magnets are weaker than the natural magnets.
What are natural and artificial-magnets?
Describe the method by which an iron bar can be made a magnet.
Tick the most appropriate answer.
A permanent magnet can be demagnetized by
Fill in the blank.
Permanent magnets are generally made of steel, cobalt, nickel, or an alloy called ...............
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 |
