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प्रश्न
Complete the table.
| Limitations of Solar energy | Limitations of Wind energy |
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उत्तर
| Limitations of Solar energy | Limitations of Wind energy |
| Solar energy is difficult to employ. | Wind velocity necessary for wind-energy generation is not available everywhere |
| Solar energy cannot be used at night or on cloudy days. | The wind velocity at specific locations depends on many geographical factors |
| Solar energy is not available uniformly during the day time and at all the places on the earth. | Wind velocity is usually high on sea shores and therefore that environment is more appropriate for the installation of wind turbines |
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संबंधित प्रश्न
A solar water heater cannot be used to get hot water on
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
Name that part of a box-type solar cooler which allow the sun's heat rays to enter the box but does not allow inside heat to go out.
Explain why, a plane mirror reflector is used in a box-type solar cooker.
Name the semi-conductor material which is usually used for making solar cells.
What is solar constant? What is the value of solar constant?
With the help of a labelled diagram, explain the construction and working of a solar cooker.
Solar cells are made of:
(a) conductors
(b) insulators
(c) semi-conductors
(d) super-conductors
In a solar water heater, why is the storage tank placed at a higher lever than the solar panel containing coils?
Name one source of energy which is not derived from solar energy directly of indirectly.
Observe the connections of cells shown in the following images.
i. Which connection will give maximum potential difference?
ii. Give one advantage and one disadvantage of this energy.
Write a short note on electrical energy generation and environment.
Make a table based on forms of energy and corresponding devices:
| Forms of Energy | Devices | |
| a. | Electric | _________ |
| b. | Mechanical | Sewing machine, Bicycle |
| c. | Thermal | __________ |
| d. | _________ | Solar cooker, Solar heater |
Give scientific reason.
Hydropower, solar energy and wind energy are called renewable energy.
What is the disadvantage of solar energy?
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Choose the correct statement.
How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
Observe the figure and label it properly:
- What is the figure related to?
- Why are reflectors used?
- Draw a flow chart showing different stages in such a process.
- How is the process used to generate electricity?
- What other method can be used to generate electricity using the same energy source?
