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प्रश्न
You are given an iron strip. How will you make it into a magnet?
उत्तर
The ‘Touch and stroke’ method can be used to make an iron strip into a magnet. For this, a bar magnet is required. The bar magnet is moved along the length of the iron strip starting from one end to the other end (as shown in the given figure).
Then, the bar magnet is lifted from the other end and brought to the starting point again with the same pole of the bar magnet. On repeating the process at least 30 to 40 times, the iron strip will become a bar magnet with two poles.
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संबंधित प्रश्न
Write true or false of the following statement.
Permanent magnets get easily demagnetised.
Select the correct answer
Making a magnetic substance a magnet by bringing it closer to another magnet without touching it, is
Describe the method by which an iron bar can be made a magnet.
Tick the most appropriate answer.
Temporary magnets are made of
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 ...............
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.
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 |
