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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
State if the following statement is true or false. Correct the statement if it is false.
As we move away from a magnet, its attraction power weakens.
If a bar magnet is hung by a thread tied at its center, its north pole becomes steady in the direction of the ______ Pole of the earth.
Since every iron atom is a tiny magnet, why are not all iron bar magnets?
What is meant by electrostatic induction? You have been given two metal containers A and Band a positively charged body X. With the help of a diagram, explain the different stages of charging - A positively, and B negatively.
With the help of a diagram explain the following:
Magnetisation of an iron bar by a single touch method.
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
Match the following:
| 1. | Electricity and magnetism | a. | Step-down transformer |
| 2. | Force on the conductor | b. | Hans Christian Oersted |
| 3. | Electric bell | c. | I LB |
| 4. | Ns <Np | d. | Electromagnet |
Define natural magnet.
Define artificial magnet.
