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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
Fill in the blank
Like poles ______ each other and unlike poles _____
Explain the meaning of the term magnetic field ?
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
Name four appliances which work using electricity ?
Answer the following.
Why is it not possible to isolate a single magnetic pole?
Answer the following in detail.
How can a magnet be demagnetized?
Define the following term regarding a bar magnet:
Magnetic axis
With whom should I pair up?
| Group 'A' | Group 'B' |
| (a) Compass | 1. The highest magnetic force |
| (b) The door of a cupboard | 2. Like poles |
| (c) Repulsion | 3. A magnet |
| (d) Magnetic pole | 4. A magnetic needle |
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
