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प्रश्न
You are given two similar bars. One is a magnet and the other is of soft iron. How will you distinguish and identify them ?
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उत्तर
Take first bar and suspend it in a stand with the help of a thread. So that it is free to rotate in horizontal plane. Note the direction in which it sets itself. If the direction is North and South it may be magnet. Again rotate it, if this time again it sets itself in north and south direction, it is a magnet, otherwise it is iron.
Now repeat above experiment with second bar and in the same way find it if it sets always in north and south direction then it will be a magnet.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| A) Steel | 1) to store magnets |
| B) Soft iron | 2) temporary magnet |
| C) Use in electric bell | 3) permanent magnet |
| D) Magnetic keepers | 4) electromagnet |
Fill in the blank.
Magnetic poles always exist in ...............
Answer the following in detail.
List four methods of magnetizing a magnetic substance.
Fill in the blank.
The perpendicular bisector of the line joining the two poles of a magnet is called ...................
Define the term Magnetic axis
Give scientific reason:
Two steel needles hanging from the lower end of a vertical bar magnet do not hang vertically.
Explain the following:
Resistance of a conductor
The south pole of a bar magnet and the north pole of a U-shaped magnet will _______.
Give the uses of magnets in everyday life.
