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प्रश्न
Tick the most appropriate answer.
A permanent magnet can be demagnetized by
विकल्प
hammering
heating
rough handling
all of these.
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उत्तर
all of these.
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संबंधित प्रश्न
Write true or false of the following statement.
Artificial magnets are weaker than the natural magnets.
Fill in the blank.
Temporary magnets are usually made up of .................
Describe the method by which an iron bar can be made a 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.
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?
