Which of these statements are correctly matched?
1. Solar energy - energy generated from the sun
2. Hydel energy - energy derived from water
3. Geothermal energy - energy from firewood, animal dung, when it is burnt
Choose from the following options.
Which of these statements are correctly matched?
1. Photovoltaic Electricity – uses photovoltaic cells that absorb the direct sunlight to generate electricity.
2. Solar-Thermal Electricity – uses a solar collector with a mirrored surface that reflects the sunlight onto a receiver that heats a liquid.
Choose from the following options.
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Consider the following statements about the Onshore wind farms.
1. They operate on land, where the wind tends to be the strongest.
2. The turbines of Onshore wind farms are less expensive and easier to set up, maintain, and operate than offshore turbines.
Which of these statements is/are correct?
Consider the following statements regarding the working of wind turbines.
1. High altitude locations have low air pressure and lighter air, so they are less productive turbine locations.
2. The dense, heavy air near sea level drives rotors faster and thus relatively more effectively.
Which of these statements is/are correct?
Consider the following statements.
1. Hydraulic power can be captured when water flows down from a higher level to a lower level, thereby converting the mechanical energy of water into kinetic energy to drive the generator.
2. Hydropower is the cheapest and cleanest source of energy.
Which of these statements is/are incorrect?
Consider the following statements.
1. Waves result from the wind's interaction with the surface of the sea and represent a transfer of energy from the wind to the sea.
2. Energy can be extracted from tides by creating a reservoir or basin behind a barrage.
Which of these statements is/are correct?
Consider the following statements about the process of Pyrolysis/Gasification.
1. In this process, waste is directly burned in the presence of excess air (oxygen) at high temperatures (about 800°C), liberating heat energy, inert gases, and ash.
2. Combustion results in 65–80% of the organic matter's heat content to hot air, steam, and hot water.
3. The steam generated, in turn, can be used in steam turbines to generate power.
Which of these statements is/are correct?
Consider the following statements about geothermal energy.
1. The most common current way of capturing the energy from geothermal sources is to tap into naturally occurring "hydrothermal convection" systems where cooler water seeps into the earth's crust, is heated up, and rises to the surface.
2. When heated water is forced to the surface, it is relatively easy to capture that steam and use it to drive electric generators
Which of these statements is/are correct?
Consider the following statements.
1. Fuel cells are electrochemical devices that convert the chemical energy of a fuel directly and efficiently into electricity (D.C.) and heat, thus doing away with combustion.
2. The most suitable fuel for such cells is hydrogen or a mixture of compounds containing hydrogen.
3. A fuel cell consists of an electrolyte sandwiched between two electrodes.
Which of these statements is/are correct?
Consider the following statements regarding the Conventional source of energy:
I. The conventional sources of energy are the fossil fuels which took millions of years for the formation of fossil fuels; hence they are limited and non-renewable.
II. Fossils are remains of organisms that lived in the past and fossil fuels are plants that got buried under earth that became rock over years.
Which of the following statement(s) is/are correct?
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545 videos|948 docs|362 tests
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