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प्रश्न
What do you know about wind energy?
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उत्तर
The wind is used to produce electricity. When the wind blows, it turns the three large blades of the windmill, which are attached to the turbine. The turbine, which is connected to the generator, converts the energy of the wind into electrical energy.
Wind, like the sun, is nature’s gift to the earth. It is free and widely available.
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संबंधित प्रश्न
What is meant by a renewable source of energy? Give two examples of renewable sources of energy.
A non-renewable source of energy is:
(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas
Most of the fuels contain carbon as one of the constituents. Name a fuel which has very high calorific value but not contain carbon.
State one important use of CNG these days.
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name another element which is usually found in combination with X in fossil fuels.
The energy in petrol originally came from the sun. Explain how it got into petrol.
Name the original source of wind energy.
Name the constituents of biogas.
Name the clean fuel which can be obtained from cow-dung.
Fill in the following blank with suitable word:
Tidal waves build up and recede ........... a day.
What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why?
Name the major component of biogas.
An energy efficient devices for producing light is:
(a) DLF
(b) CFL
(c) FCL
(d) LPG
State whether the following is True or False.
Coal and petroleum are renewable energy resources.
Can you tell?
What is ‘green energy’?
Who is the odd one out?
The major problem in harnessing nuclear energy is how to ______.
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Nutsgilh is an example of inexhaustible natural resources.
Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.
| air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen |
