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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
How are the magnets kept safely? What is the role of keepers in storing the magnets?
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.
Answer the following in short.
If a bar magnet is placed over iron filings, where will the attraction of the iron fillings be
- maximum?
- minimum?
Which magnet will you use?
A window shutter opens and shuts continuously in the wind.
The alloys called ______ and ______ are used for making industrial magnets.
Draw the magnetic flux pattern near a bar magnet placed with its axis in the magnetic meridian and the south pole pointing towards geographic north.
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
Which is not attracted by a 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 |
