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प्रश्न
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उत्तर
Disadvantages of setting up large dams for hydro-electricity power station::
(1) It leads to large catchment area being submerged
(2) displacement of people from their places.
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संबंधित 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 ?
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
How are the magnets kept safely? What is the role of keepers in storing the magnets?
Define the following term regarding a bar magnet:
Magnetic axis
Fill in the blank.
The perpendicular bisector of the line joining the two poles of a magnet is called ...................
If a magnet attracts a piece of metal, that piece must be made of ______.
Select the correct option:
The place around a magnet where its influence can be detected is called:
Define the term Effective length of a magnet
What is a neutral point?
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
