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प्रश्न
Choose the correct answer.
Windmills have been used for many centuries in
पर्याय
the USA
the Netherlands
Russia
India
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उत्तर
Windmills have been used for many centuries in the Netherlands
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संबंधित प्रश्न
Define ignition temperature of a fuel.
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?
A non-renewable source of energy is:
(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas
Write a short note on the pollution caused by burning fossil fuels.
Why is LPG considered a better fuel than coal?
Explain how, sun is considered to be the ultimate source of fossil fuels
Which of the following is not a fossil source of energy?
(a) kerosene oil
(b) cow-dung cakes
(c) CNG
(d) coal
The energy in petrol originally came from the sun. Explain how it got into petrol.
The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.
Name the device
What is the function of anaerobic micro-organisms such as anaerobic bacteria in a biogas plant?
What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why?
Which of the following sources of energy are not derived from the sun?
Biomass, Wind, Ocean thermal energy, Geothermal energy, Nuclear fuels, Hydroelectricity, Wave energy, Coal, Petroleum, Tidal energy
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?
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
Describe the four major types of coal.
Tidal energy is ______ type of energy.
Which of the following is a non-renewable source of energy?
Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?
