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Worksheet for Class 10 Physics Chapter 14 Sources of Energy
Class 10 Physics students should refer to the following printable worksheet in Pdf for Chapter 14 Sources of Energy in standard 10. This test paper with questions and answers for Grade 10 Physics will be very useful for exams and help you to score good marks
Class 10 Physics Worksheet for Chapter 14 Sources of Energy
SOURCE OF ENERGY
Thermal power plants
• Thermal power plants use steam produced by burning fossil fuels (mainly coal) to move the turbines to generate electricity.
• The burning of coal heats up the water and forms steam that is used to run the turbine.
• Usually, Thermal power plants are located near coal or oil fields as it is easier to transmit electricity than transport coal.
Hydropower Plants
Turbines
• A turbine is a rotatory mechanical device that extracts kinetic energy in various forms and converts it into useful work. It uses a dynamo to convert this mechanical energy into electrical energy.
• Various uses of this have been implemented in power plants where the shaft of the dynamo is made to rotate by mechanical means.
Hydropower plants
• Another traditional source of energy is from the kinetic energy of flowing water or harnessing potential energy of water falling from a height.
• The falling/flowing water moves the turbine, which with the help of a dynamo converts mechanical energy into electrical energy.
• Hydropower plants are usually constructed near dams or waterfalls.
Dams A dam is a barrier that impounds water or underground streams. The water is ejected upon requirement by the power plant to generate hydroelectricity.
Fuels
Biomass
• Biomass is the source of energy derived from living things (organic matter). For a long time, we relied on wood for the source of heat energy. In India, we make fuel out of biowaste such as cow dung due to the availability of a thriving population of livestock.
• When wood is burnt in a limited supply of oxygen and water until volatile materials are removed, the residue left behind is charcoal. Charcoal has good heat generating efficiency. It also burns without flames.
Bio-gas plant
• In India cow dung, sewage waste, plant matter are decomposed in absence of oxygen to produce biogas. Since it has cow dung it is often termed as gobar gas
• A biogas plant is a dome-like structure built with bricks where cow dung and other biowaste are mixed with water to form a slurry and put into a digester.
• The digester is a sealed chamber with anaerobic bacteria which breaks down the slurry.
• This decomposition process releases gases like methane, CO2, hydrogen sulfide and hydrogen.
• These gases are drawn via pipes which are transmitted to a turbine for the production of electricity.
Wind Energy
Wind energy
• Environment-friendly efficient source of energy.
• Wind is the natural phenomenon caused by pressure differentials due to unequal heating of land and water masses on the surface of the earth. It is harnessed in the form of kinetic energy.
Windmill
• Wind Energy is harnessed by rotatory structures known as windmills.
• They have huge blades or fans attached very high on a rigid support that is attached to turbines that rotate due to high speeds of wind and generate electricity.
• A single windmill has a low output and therefore, the wind farms are built that comprises of several windmills.
Advantages and limitations of wind energy Advantages: Environment-friendly, efficient, renewable source, with no recurring cost for production of electricity.
Limitations:
• Wind speeds should be constant and > 15 km/h.
• Must have back up storage facilities like cells.
• Requires large land area.
• High initial cost and regular maintenance are required
QUESTIONS BASED ON ABOVE TOPICS:-
Question : The thermal efficiency of a steam power station is….......
Answer : 28%
Question : The height of chimney in a staem power plant is governed by........
Answer : The draught to be produced
Question : What is the source of energy in hydro power plants?
Answer : Flowing water
Question : Explain in brief about the process of formation of electricity from hydro power plants.
Answer : Hydro Power Plants convert kinetic energy of flowing water or potential energy of water at a height into mechanical energy and mechanical energy so produced in converted into electrical energy. Electricity produced from Hydro Power Plants, big and high rise dams are constructed on the river.
Question : What are 5 advantages of hydropower?
Answer : Advantages of Hydroelectric Energy
• 1 Renewable. Hydroelectric energy is renewable. ...
• 2 Green. Generating electricity with hydro energy is not polluting itself. ...
• 3 Reliable. Hydroelectricity is very reliable energy. ...
• 4 Flexible. As previously mentioned, adjusting water flow and output of electricity is easy. ...
• 5 Safe.
Question : Is biogas cheaper than LPG?
Answer : CNG car cylinder shown above can be easily swapped with Biogas (gobar gas) because both are the same thing - METHANE. Biogas is more safer than CNG and 3 times more safer than LPG cylinder. Biogas is the Cheapest and never ending multipurpose fuel.
Question : Is biogas a fossil fuel?
Answer : Biogas is also a hydrocarbon fuel, but generally speaking biogas is not a fossil fuel because it was not mined and captured from a geological deposit. Even if biogas is purified to be almost identical to natural gas it is still not a fossil fuel, but rather renewable methane.
Question : What are the limitations of wind energy ?
Answer : (i) Wind energy farms can be set only at places where wind blows for a greater part of the year.
• (ii) Wind speed should be greater than 15 km/h.
• (iii) Require vast area of land to set up wind farm.
• (iv) Initial cost of establishment of wind farm is very high.
Question : How you can produce electricity from a wind farm?
Answer :
Question : If energy can neither be created nor destroyed, explain with an example as to why we should worry about our energy crisis?
Answer : Energy comes in different forms and one form can be converted into another form. For example-if we light a candle, the process is highly exothermic so that the chemical energy in the candle changes into heat energy and light energy on burning. The total energy during a physical and chemical process remains the same but we cannot again put together the heat and light generated along with the products of the reaction to get back the chemical energy in the form of wax. Hence, energy, in the usable form, is dissipated to the surroundings in less usable forms. So the sources of energy we use to do work is consumed and cannot be used again.
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Question : What is energy?
Question : What do you mean by ‘source of energy’?
Question : What should be the characteristics of a good source of energy?
Question : Name a few sources of energy used in our daily life.
Question : What are renewable and non-renewable sources of energy? Give examples of each.
Question : Name some of the sources of energy used in ancient times.
Question : Give 2 advantages and 2 disadvantages, each of renewable and non-renewable sources of energy.
Question : What are fossil fuels? Give a few examples.
Question : Name a gaseous fossil fuel.
Question : Which of the following is not derived from solar energy: - geothermal, wind energy, fossil fuels, biomass.
Question : What are the limitations of extracting energy from (a) the wind (b) the waves (c) the tides.
Question : What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
Question : Name two indirect ways of using solar energy.
Question : give the transformation of energy (sequence) taking place in
(a) Thermal power plant (b) hydro power plant (c) solar cell
Question : Give advantages and disadvantages of constructing dams.
Question : Name the plant and animal products that are used as fuel.
Question : What is biomass?
Question : How do we get charcoal?
Question : What is bio-gas?
Question : What are the advantages of using bio-gas as fuel?
Question : Why is burning of firewood in traditional chulhas considered disadvantageous?
Question : Give the constituents of bio-gas.
Question : What are the advantages of bio-gas over traditional fuels?
Question : Describe the process of bio-gas production in a bio-gas plant.
Question : Name the type of energy possessed by wind.
Question : What is a (a) windmill (b) winds energy farm?
Question : How does a windmill help in generating electricity?
Question : How can wind be sued for lifting or pumping up water?
Question : Give the advantages and disadvantages of using wind as a source of energy.
Question : What should be the minimum wind velocity for a windmill to function?
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CBSE Class 10 Science Chapter 14 Sources of Energy Worksheet
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Worksheet for Science CBSE Class 10 Chapter 14 Sources of Energy
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Chapter 14 Sources of Energy worksheet Science CBSE Class 10
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Chapter 14 Sources of Energy CBSE Class 10 Science Worksheet
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Worksheet for CBSE Science Class 10 Chapter 14 Sources of Energy
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