Advertisements
Advertisements
प्रश्न
What do you know about wind energy?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
What is meant by a renewable source of energy? Give two examples of renewable sources of energy.
What is the difference between a renewable and a non-renewable source of energy? Explain with examples.
Why are fossil fuels classified as non-renewable source of energy?
Classify the following
Coal, Wind, Tides, Petroleum,Wood, Natural gas
What is the basis of above classification?
Which of the following fuels has the highest calorific value?
(a) natural gas
(b) methane gas
(c) hydrogen gas
(d) biogas
What are the disadvantages of burning fossil fuels?
Which fossil fuels were formed by the buried remains of small plants and animals?
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name the element X.
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
Name the substance X.
Fill in the following blank with suitable word:
Tidal waves build up and recede ........... a day.
The fuel which is not obtained from biomass is:
(a) firewood
(b) cow-dung cakes
(c) coke
(d) charcoal
A certain form of energy is available due to the difference in the temperature of water at the surface of the ocean and its deeper levels.
(a) Name the form of energy.
(b) Is this energy ultimately derived from the sun or not?
(c) Explain how this form of energy can be converted into electricity.
(d) What is the minimum temperature difference in water at the surface of ocean and its deeper level which is required to operate power plants based on is energy?
Which of the following is ultimately not derived from the sun's energy (or solar energy)?
(a) wind energy
(b) nuclear energy
(c) biomass energy
(d) ocean thermal energy
Choose the correct answer.
The coal that has the highest percentage of carbon is
Can you tell?
What is ‘green energy’?
Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?
Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?
Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.
| air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen |
Look at the figure where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer?
Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.
