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NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy

NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy

Edited By Vishal kumar | Updated on Jul 24, 2023 02:35 PM IST | #CBSE Class 10th

NCERT Solutions for Class 10 Science Chapter 14 – Download Free PDF

Chapter 14 science class 10 question answer Sources of Energy - Energy can neither be created nor be destroyed. Such universal facts are explained in Class 10 Science chapter 14 question answer. The solutions contain the answers to the questions given in the NCERT Class 10 science book. Therefore, it is important for students to use class 10 science chapter 14 solutions to know the correct answers and understand the topics well. Each topic is explained in the given solution with the help of well-known examples around us.

NCERT Solutions are an excellent tool for students taking board exams. Sources of energy class 10 questions and answers offer a comprehensive guide to students, allowing them to identify areas where they need improvement and work on overcoming any shortcomings before the exam.

Also, check NCERT Class 10 solutions for other subjects and chapters.

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What is Explained in NCERT Class 10 Science Solutions Chapter 14 Sources of Energy?

Ever wonder what happens when water is boiled at 75 degrees Celcius and is kept in a room where the temperature is 25 degrees Celcius? Such examples are quoted in sources of energy class 10 solutions to make learning better and easier.

NCERT Solutions for Class 10 Science: Important Formulas and Diagrams + eBook link

The "Important Formulas and Diagrams" in NCERT Solutions for ch 14 science class 10 serve as valuable tools for students to quickly revise key concepts and equations. These condensed summaries aid in better retention and reinforcement of essential information. Also, the eBook link provides easy access to the comprehensive NCERT solutions, enabling students to study and practice anytime, anywhere, and at their convenience.

Download Ebook - NCERT Class 10 Science: Chapterwise Important Formulas, Diagrams, And Points

NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy - Important Topics

class 10 science ch 14 solutions, "Sources of Energy," covers topics such as renewable and non-renewable energy sources, including solar, wind, hydroelectric, biomass, geothermal, and fossil fuels. It discusses the importance of conserving energy and future challenges in meeting energy needs sustainably. In the exam, expect questions on renewable energy types, advantages/disadvantages of fossil fuels, energy conservation significance, and future energy challenges. Understanding these topics and sources of energy class 10 questions and answers is crucial for a comprehensive grasp of energy sources and their impact on our world.

Download NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy for free.

As of the latest CBSE Syllabus 2023-24, Chapter 14 "Sources of Energy" has been removed from the Class 10 Science curriculum.

NCERT Solutions Class 10 Science Chapter 14 – Sources of Energy

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CBSE NCERT solutions for ch 14 science class 10 sources of energy topic 14.1 What is a good source of energy?

Q. 1. What is a good source of energy?

Answer:

A good source of energy has the following properties.

(i) It is easily available.

(ii) It is economical.

(iii) Has a high calorific value.

(iv) It's use must not cause pollution.

(v) Must be safe to store and easy to transport.

Q. 2. What is a good fuel?

Answer:

A good fuel has the following properties.

(i) It is easily available.

(ii) It is economical.

(iii) Has a high calorific value.

(iv) It's combustion must not produce any poisonous smoke.

(v) Must be safe to store and easy to transport.

(vi) Has an ignition temperature well above the room temperature.

(vii) Ash or residue must not be produced on combustion.

(viii) The combustion must be easily controllable.

Q. 3. If you could use any source of energy for heating your food, which one would you use and why?

Answer:

I would use Solar energy as it is available free of cost and does not cause any pollution.

Solutions of NCERT for class 10 science chapter 14 sources of energy topic 14.2 Conventional sources of energy:

Q. 1. What are the disadvantages of fossil fuels?

Answer:

The disadvantages of fossil fuels are the following:

(i) Their combustion produces smoke causing air pollution.

(ii) They produce carbon dioxide on burning which causes green house effect and is therefore responsible for global warming.

(iii) They produce oxides of Sulfur and Nitrogen on burning which cause acid rain.

(iv) Fossils fuels are not a renewable source of energy.

Q. 2. Why are we looking at alternate sources of energy?

Answer:

We are looking at alternate sources of energy primarily because of the following two reasons.

(i) Traditionally used fossil fuels are exhaustible and non-renewable and therefore eventually we would run out of them.

(ii) The burning of fossil fuels causes pollution of the atmosphere, soil and our water bodies and cause global warming which has posed a serious threat to the environment.

Q. 3. How has the traditional use of wind and water energy been modified for our convenience?

Answer:

Wind energy is utilised through the construction of wind mill farms.

Water energy is utilised by building hydro-power plants. The kinetic energy of the water is used to produce electricity by rotating the arms of a generator.

NCERT solutions for class 10 science chapter 14 sources of energy topic 14.3 Alternative or non conventional sources of energy:

Q. 1. What kind of mirror - concave, convex or plain - would be best suited for use in a solar cooker? Why?

Answer :

Concave mirror would be best suited in a solar cooker as it will be able to produce a concentrated beam of high intensity which will produce more heat.

Q. 2. What are the limitations of the energy that can be obtained from the oceans?

Answer:

The forms of energy that can be obtained from the ocean are mainly tidal energy, wave energy and thermal energy. The limitations in harnessing these forms of energy are the following

(i) There are very few sites in the world where high tides are regularly present.

(ii) There are very few shores where waves of high kinetic energy reach regularly.

(iii) To harness the ocean's thermal energy the Temperature difference between the surface and the depth must be at least 20 o C. Again such sites are very less.

Q. 3. What is geothermal energy?

Answer:

Energy stored inside the earth in form of thermal energy is called geothermal energy. Due to geological changes the lava present in the core of the earth is pushed towards the surface of the earth thus creating places having extremely high temperature called hot spots.

When water comes in contact with these hot spots high pressure steam is formed which can be used to generate electricity.

Q. 4. What are the advantages of nuclear energy?

Answer:

Nuclear energy has the following advantages:

(i) It's calorific value is much larger than conventional fossil fuels.

(ii) By regulating rate of nuclear fission energy can be generated at very high rate.

(iii) Nuclear fission does not form any smoke.

(iv) Once fully loaded a nuclear reactor can produce high amounts of energy for very long time at a stretch without having to be reloaded.

CBSE NCERT Chapter 14 science class 10 sources of energy topic 14.4 Environmental consequences:

Q. 1. Can any source of energy be pollution-free? Why or why not?

Answer:

No source of energy can be completely pollution free.

Even if the production of energy through a source does not harm the environment the formation of the assembly required to harness the energy would cause some minimal amount of pollution e.g. Solar energy, Hydro energy.

Q. 2. Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not?

Answer:

Of course Hydrogen is a cleaner fuel than CNG because burning hydrogen produces only water which is not harmful for the environment at all whereas combustion of CNG produces carbon dioxide causing green house effect and other harmful oxides causing acid rain.

NCERT solutions for class 10 science chapter 14 sources of energy topic 14.5 How long will an energy source last us?

Q. 1. Name two energy sources that you would consider to be renewable. Give reasons for your choices.

Answer:

The following sources of energy are renewable:

(i) Wind energy is renewable as winds will be moving as long as the normal behavior of the weather and our environment persists.

(ii) Hydro energy is renewable as hydro energy can be harnessed as long as the flowing water bodies like rivers and waterfalls exist.

Q. 2. Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.

Answer:

The following resources of energy are exhaustible:

(i) Fossil fuels are exhaustible as they take millions of years to form which is practically forever as compared to the rate at which they are being exhausted.

(ii) Nuclear sources are exhaustible as the number of nuclear fuels on the earth is limited.

Solutions of NCERT for class 10 science chapter 14 sources of energy Exercise:

Q. 1. A solar water heater cannot be used to get hot water on

(a) a sunny day.

(b) a cloudy day.

(c) a hot day.

(d) a windy day.

Answer:

A solar water heater cannot be used to get hot water on a cloudy day as much sun light won't be present for energy to be harnessed.

(b) is the correct answer.

Q. 2. Which of the following is not an example of a bio-mass energy source?

(a) wood

(b) gobar-gas

(c) nuclear energy

(d) coal

Answer:

Nuclear energy is not an example of a bio-mass energy source as its origin is not biological elements.

(c) is the correct answer.

Q. 3. Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?

(a) geothermal energy

(b) wind energy

(c) nuclear energy

(d) bio-mass

Answer:

Geothermal energy is not ultimately derived from the Sun’s energy, it's origin is the high-temperature molten rocks present in the core of the earth.

(a) is the correct answer.

Q. 4. Compare and contrast fossil fuels and the Sun as direct sources of energy.

Answer:

Both fossil fuels and solar energy are direct sources of energy but have the following differences between them.

Fossil Fuels Solar Energy
(i) Non-renewable source of energy. (i) Renewable source of energy.
(ii) Economical. (ii) Expensive to harness.
(iii) Pollutes the environment. (iii) Is environment friendly.
(iv) They are exhaustible. (iv) Solar energy is non-exhaustible.
(v) Fossil fuels are available throughout the year. (v) Solar energy can be harnessed only on sunny days.

Q. 5. Compare and contrast bio-mass and hydro electricity as sources of energy.

Answer:

Biomass Hydro electricity
(i) Renewable source of energy. (i) Renewable source of energy.
(ii) Biomass plants can be installed anywhere. (ii) Hydro power plants can be installed only in fast flwoing water bodies.
(iii) Not very economical to collect the organic waste (biomass) required. (iii) Once the plant is set up harnessing of energy is very economical.

Q. 6(a). What are the limitations of extracting energy from (a) the wind?

Answer:

Wind mill farms can be set only at places where fast flowing winds are present throughout the year and such sites are very less.

Also the setting up of wind mill farms is a very expensive process and requires large areas of land.

Q. 6(b). What are the limitations of extracting energy from (b) waves?

Answer:

Energy from waves can be efficiently harnessed at very few sites as there are very less places where high energy waves are present throughout theyear.

Q. 6(c). What are the limitations of extracting energy from (c) tides?

Answer:

Energy from tides can be efficiently harnessed at very few sites as there are very less places where high energy tides are present throughout the year.Setting up of the tidal dams is also an expensive process and the energy harnessed is also not very large.

Q. 7. On what basis would you classify energy sources as

(a) renewable and non-renewable?

(b) exhaustible and inexhaustible?

Are the options given in (a) and (b) the same?

Answer:

(a) The sources of energy that are replenished by the nature are called renewable sources and those which are not replenished by the nature are called non-renewable sources of energy.

(b) The sources of energy that are present in a limited quantity and would get over after some time are callued exhaustible sources of energy and those which are available in infinite amount by the virtue of nature are called inexhaustible sources of energy.

The options given in (a) and (b) are the same.

Q. 8. What are the qualities of an ideal source of energy?

Answer:

An ideal source of energy should have the following properties:

(i) Must be providing sufficient quantities of energy.

(ii) Must be economical to harness.

(iii) Must not cause pollution of the environment.

(iv) Must be easy, cheap and safe to store and transport.

Q. 9. What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?

Answer:

Advantages of the solar cooker are the following:

(i) Use of solar cooker saves precious and exhaustible sources of energy such as LPG.

(ii) Use of solar cooker is environment-friendly as opposed to combustible sources of energy.

(iii) Solar energy is available free of cost to all.

Disadvantages of the solar cooker are the following.

(i) A solar cooker can be used only during day time.

(ii) A solar cooker cannot be used on a cloudy day.

Q. 10. What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

Answer:

Some of the environmental consequences of the ever-increasing demand for energy are the following:

(i) Combustion of fossil fuels is causing air pollution, acid rain and global warming.

(ii) Buiding of hydropower plants disturbs the ecological balance of the water bodies and aquatic organisms.

(iii) The ever increasing demand of firewood has severely decreased the forest area causing global warming.

(iv) Use of nuclear sources poses the risk of radioactivity caused by nuclear waste.

Some of the steps that could be taken to reduce energy consumption are.

(i) Switching off the lights, fans, air-conditioners etc. when not in use.

(ii) Using efficient electrical appliances.

(iii) Using a bicycle or public mode of transport to reduce the consumption of fossil fuels.

Sources of Energy Class 10 NCERT Topics

You are going to study the following topics in this Sources of Energy class 10 Science NCERT Solutions chapter 14:

  1. What is a good source of energy?

  2. Conventional sources of energy

  3. Alternative or non-conventional sources of energy

  4. Environmental consequences

  5. How long will an energy source last us?

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NCERT Solutions for Class 10 - Subject Wise

Types of Questions in NCERT Solutions Class 10 Science Chapter 14 for Board Exams:

  • Generally, 4 types of questions are asked in the class 10 science board exam i.e. very short answer type, short answer type, long answer type and practical-based questions which are for 1 to 5 marks.

  • In 2017 and 2018, 1 mark questions, generally, 1 or 2, have been asked from this chapter.

  • Studying solutions of NCERT for class 10 science chapter 14 sources of energy becomes extremely important as class 10 is the board class where even 1 mark can make a big difference.

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NCERT Class 10 Science Solutions Chapter 14 - Weightage in Board Exams

class 10 science chapter 14 question answer hold a weightage of 1 mark in the board exams. In the previous year's examination, a single question was asked from this chapter. It is essential for students to study this chapter thoroughly and be well-prepared for the examination to score well in this section.

Benefits of Sources of Energy Class 10 Solutions

  • These CBSE NCERT solutions for Class 10 Science chapter 14 are detailed which explain all the answers of questions related to Sources of Energy.

  • Students can use ch 14 science class 10 solution to understand the concepts as well as learn how to answer questions in the board exams.

  • Since practice is an essential part of your board exam preparation, check the questions asked in the CBSE Class 10 previous papers from this chapter.

  • Students can then use the sources of energy class 10 questions and answers to know the answers. If the same questions or similar ones are asked, they will be able to answer them.

  • However, NCERT Class 10 Science chapter 14 pdf download will be available soon. But till then, you can download them as a webpage file to access NCERT 10th Science chapter 14 solutions.

How to Access NCERT Solutions for Class 10 Science Chapter 14?

To access class 10th science chapter 14 question answer "Sources of Energy," follow these steps:

  • Scroll down or navigate to the section related to Class 10 Science Solutions.
  • Look for the specific chapter "Sources of Energy" in the list of chapters available for Class 10 Science.
  • Click on Chapter 14 - "Sources of Energy" to access the solutions for this chapter.
  • The solutions will be provided in the form of text or PDF format, and you can use them to study and solve numerical problems related to Sources of Energy in Class 10 Science.

Also Check NCERT Books and NCERT Syllabus here:

CBSE NCERT solutions for class 10 science - chapter wise

NCERT Science Exemplar Solutions Class 10 - Chapter Wise

We have provided all the essential information about class 10 science chapter 14 question answer "Sources of Energy," and we believe that this comprehensive article on sources of energy, including questions and answers, will be beneficial for students. If you have any queries or uncertainties about this article or CBSE Class 10 Physics sources of energy questions and answers, please feel free to leave your comments below, and we will respond promptly to address your concerns. Your feedback is valuable to us, and we are here to assist you at your earliest convenience. Happy learning!

Frequently Asked Question (FAQs)

1. What are the important topics of class 10 science Chapter 14?

Different Forms of Energy, Conventional and Non-Conventional Sources of Energy, Biogas, Wind, Water and Tidal energy, Nuclear energy, Renewable versus Non-Renewable Sources of Energy, Fossil fuels are the important topics of NCERT Class 10 Science Solutions chapter 14.

2. What is the weightage of Chapter 14 Sources of Energy in the CBSE class 10 board final exam?

This chapter has a weightage of 1-2 marks. To get more questions on Sources of Energy refer to NCERT exemplar.

3. Does CBSE provide the solutions of NCERT class 10?

No, CBSE doesn’t provide NCERT solutions for any class or subject. But, these solutions are prepared as per CBSE Class 10 syllabus.

4. What are the drawbacks of fossil fuels which are covered in class 10 science ch 14 solutions?

The negative impacts of using fossil fuels include:

  • The burning of fossil fuels results in pollution.

  • Acid rain is also a result of fossil fuel use.

  • Soil fertility decreases and water quality decreases.

  • The emission of hazardous gases from burning fossil fuels is a major contributor to global warming.

5. How to achieve a comprehensive understanding of the concepts covered in ch 14 science class 10?

Acquiring the proper knowledge and comprehension of the concepts is crucial for Class 10 students. Choosing the right study materials is critical in achieving a deep understanding of the concepts. With this in mind, the experts at Careers360 have created solutions to support students in improving their academic performance. The solutions can also be used to verify answers and identify areas that need improvement.

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Dear aspirant !

Hope you are doing well ! The class 10 Hindi mp board sample paper can be found on the given link below . Set your time and give your best in the sample paper it will lead to great results ,many students are already doing so .

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://school.careers360.com/download/sample-papers/mp-board-10th-hindi-model-paper&ved=2ahUKEwjO3YvJu5KEAxWAR2wGHSLpAiQQFnoECBMQAQ&usg=AOvVaw2qFFjVeuiZZJsx0b35oL1x .

Hope you get it !

Thanking you

Hello aspirant,

The dates of the CBSE Class 10th and Class 12 exams are February 15–March 13, 2024 and February 15–April 2, 2024, respectively. You may obtain the CBSE exam date sheet 2024 PDF from the official CBSE website, cbse.gov.in.

To get the complete datesheet, you can visit our website by clicking on the link given below.

https://school.careers360.com/boards/cbse/cbse-date-sheet

Thank you

Hope this information helps you.

Hello aspirant,

The paper of class 7th is not issued by respective boards so I can not find it on the board's website. You should definitely try to search for it from the website of your school and can also take advise of your seniors for the same.

You don't need to worry. The class 7th paper will be simple and made by your own school teachers.

Thank you

Hope it helps you.

The eligibility age criteria for class 10th CBSE is 14 years of age. Since your son will be 15 years of age in 2024, he will be eligible to give the exam.

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A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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