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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
Name two energy sources that you would consider to be renewable. Give reasons for your choices.
Fill in the following blank with a suitable word:
The amount of heat produce by burning a unit mass of a fuel completely is known as its ............ value.
What is meant by a non-renewable source of energy? Give two examples of non-renewable source of energy.
Name two sources of energy that you think are renewable. Give reason for your choice.
A non-renewable source of energy is:
(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas
Which of the following is not a renewable source of energy?
(a) wind
(b) flowing water
(c) fossil fuels
(d) fuel wood
A good fuel is one which possesses:
(a) high calorific value and low ignition temperature
(b) high calorific value and high ignition temperature
(c) high calorific value and moderate ignition temperature
(d) low calorific value and moderate ignition temperature
State two important uses of natural gas
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
Fill in the following blank with suitable word:
Biomass is another form in which ........... energy manifests itself.
What is biomass? Give three examples of biomass.
Write any two advantages of using biogas.
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
The source of energy of the sun is:
(a) conversion of hydrogen gas into helium
(b) conversion of carbon fuel into carbon dioxide
(c) burning of hydrogen gas present in the sun
(d) disintegration of uranium into barium and krypton
The fossil fuel whose known reserves in the earth are expected to last for the minimum period is:
(a) coal
(b) uranium
(c) petroleum
(d) natural gas
Fill in the blank
Solar cells use the power supplied by the ______.
Fill in the blank
_______is the coal with the highest percentage of coal.
State the main difference between the renewable and non-renewable sources of energy.
Fill in the blanks and complete the story.
About 300 million years ago, the earth had dense ______ in low lying wetland areas. Due to natural processes like ______, these forests got buried under the ______. As more ______ deposited over them, they were compressed. The ______ also rose as they sank deeper and deeper. Under high ______ and high ______, dead plants got slowly converted into coal.
