Xam Idea Class 10 Science Chapter 14 Solutions: Sources Of Energy

Xam Idea Class 10 Science Solutions for Chapter 14 – Sources of Energy are created as per the latest CBSE syllabus and exam pattern. These solutions are designed in a stepwise manner to maximise your understanding of the chapter. The solutions will help you to learn or understand the basic concept of how energy is produced in different ways. You will be studying some of the basic concepts like how dams produce electricity, how to use solar panels, and much more.

Xam Idea Class 10 Science Solutions for Chapter 14 Sources of Energy include 6 sections in which you have to answer different types of questions. This includes Very Short Questions, Short Questions, Long Questions and also Higher-Order Thinking Skills questions. You will learn the construction and working of the solar cooker, the difference between renewable and non-renewable energy sources, biogas, consequences of using fossil fuels and the greenhouse effect with the help of our solutions.

All the answers for Xam Idea Class 10 Science Chapter 14 – Sources of Energy are designed by the experts and by using the different techniques so that you all can understand all the basic concepts through these answers. Our subject matter experts always follow the current syllabus and include important information in the solutions from exam perspective. You can access our solutions easily in the exercise-wise format. All our Xam Idea Class 10 Science Solutions for Chapter 14 – Sources of Energy are available for FREE!

Important Topics For Xam Idea Class 10 Science Solutions Chapter 14 Sources of Energy

Sources of Energy 

  • Vitality comes in various structures and one structure can be changed over to another. For instance, in the event that we drop a plate from a stature, the potential vitality of the plate is changed over generally to sound vitality when it hits the ground.
  •  In the event that we light a flame, the procedure is exceptionally exothermic with the goal that the compound vitality of the wax is changed over into heat vitality and light vitality on consuming.

A Good Source of Energy would be the one: 

  • which has a high calorific value
  • be easily accessible
  • be easy to store and transport
  • be economical

Among the sources of energy, some of them get exhausted (Non-Renewable) While some of them do not get exhausted, therefore called a Renewable source of energy. Examples

  1. Non-Renewable source of energy: Coal, Petroleum, Natural Gas
  2. Renewable sources of energy: Air, Water, Solar radiation, Geothermal Energy, ocean waves, etc.

Conventional Sources of Energy 

Fossil Fuels

  • Fuels developed from the fossils. Eg. Coal & Petroleum. 
  • Shaped more than a huge number of years prior have just constrained stores these are a non-sustainable wellspring of vitality. 
  • India has about 6% share on the planet saved coal, which may be 250 years more at the current pace of utilization.

Wind Energy

  •  Unequal warming of the landmass and water bodies by sun based radiation creates air development and makes winds blow. This motor vitality of the breeze can be utilized to accomplish work.
  • This energy is utilized to lift water from the well & to generate electricity in the windmill.
  • The rotatory motion of the windmill is used to turn the rotor of the turbine which then generates electricity through Dynamo. 
  • The minimum wind speed for a windmill to serve as a source of energy is 20KMPH.
  • Advantages of Wind Energy
  1. Eco friendly
  2. Efficient source of renewable energy.
  3. No recurring expenses for the production of electricity


  • Limitations of Wind Energy


  1. Wind vitality ranches need an enormous region of land
  2. Difficulty in getting normal breeze speed of 15-20 KmPH. 
  3. The underlying expense of setting up a breeze vitality ranch is extremely high.
  4. A significant level of support for cutting edges of a windmill.

Non-Conventional Sources of Energy 

Solar Energy :

The energy limited by the sun in the form of heat and light is called solar energy. 

Solar energy devices :

A large number of devices that utilize solar energy directly like :

  1. Solar Cooker
  2. Solar furnaces
  3. Solar cells
  4. Solar water heaters

 Solar heating devices :

  • Use a black painted surface because the black surface absorbs more heat as compared to white or other surfaces.
  • Use of glass plate because it allows shorter infrared radiations to pass through it but doesn’t allow the longer-wavelength infrared radiations to through it, which increases the temperature.

Solar Cooker :

Box type of solar cooker

  •  It comprises of a rectangular box which is comprised of material, for example, plastic or wood.
  • The box is covered with a black sheet and its inner walls are painted black to increase heat absorption.
  • Solar cookers are covered with a glass plate and have mirrors to focus the rays of the sun and achieve a higher temperature.

Advantages : 

  1. Use vitality which is accessible in bounty (Solar Energy)
  2. Is pollution-free.
  3. Beyond what one food can be cooked all the while

Disadvantages : 

  1. Can’t be utilized for fricasseeing or preparing reason.
  2. Food can’t be cooked around evening time or on a shady day.
  3. The direction of a reflector of solar heating has to be changed from time to time to keep it facing the sun

Energy from the Sea or Ocean

 The vitality from the ocean is accessible in the accompanying structures.

(i) The energy of sea waves

(ii) Tidal energy

(iii) Ocean Thermal Energy.

(i) The energy of Sea Waves

  •  The waves are produced by the solid breezes that blow over the ocean.
  •  The motor vitality of this moving water pivots the turbine of a generator


The motor vitality of this moving water pivots the turbine of a generator

 Tidal Energy

  • The tidal energy possessed by water during tides.
  • The tides are caused due to the gravitational force of attraction exerted by the moon on the water of the ocean.
  •  This type of vitality is tackled by developing a dam over a restricted opening to the ocean.
  •  A turbine fixed at the opening of the dam changes overflowing vitality into power.

 Ocean Thermal Energy

 The force plants used to saddle the sea warm vitality is known as “Sea Thermal Energy Conversion plant) (OTEC)

  • The temperature difference between surface water and water at the depth of 2km should be 20°C or more.
  • The warm surface water is used to boil ammonia (liquid). 
  • The vapours of the liquid are used to run the turbine of a generator.
  • The cold water (from deeper layers) is pumped up to condense the vapour into liquid.

Geothermal Energy

  • Energy stored as heat inside the earth. 
  • The steam of underground water is taken out by sinking pipes through openings bored in the world’s outside. 
  • The steam under high tension is utilized to pivot the turbines of the generator to create power.

Nuclear Energy

  • Nuclear vitality is the vitality that is put away in the core of an iota.  
  • Nuclear energy is of two types

(i) Nuclear fission: nucleus of a heavy atom (Uranium) when bombarded with low energy neutron split (break down) into lighter nuclei and a huge amount of energy is released

(ii) Nuclear Fusion: When two lighter nucleic join up to form a heavy nucleus and a tremendous amount of energy is released.

  • The nuclear fission process is utilized in nuclear reactors to produce electricity.
  •  Major Nuclear force plants: Tarapur, Rana Pratap Sagar, Kalpakkam.

Advantages of Nuclear Energy :

  1. A large amount of energy is released.
  2. In a nuclear power plant, nuclear fuel is inserted once to get energy over a long period.

Disadvantages of Nuclear Energy :

  1. The high cost of installation.
  2. Natural sullying may happen because of ill-advised atomic waste removal.

Environmental Consequences

  • Vitality sources ought to be utilized reasonably else it would upset the earth. 
  • Use of clean fuels like CNG (compressed natural gas) because the burning of fossil fuel causes the greenhouse effect.
  • Assembly of devices like the solar cell (otherwise renewable source of energy) would have caused environmental damage.

How long will energy source last?

The wellsprings of vitality can be separated into two classes : 

(I) Renewable wellsprings of vitality eg wind, sun, biogas 

(II) Non-renewable sources of energy eg. Coal, Petroleum, Natural Gas.

Continuous use of a non-renewable source of energy is a matter of concern because ultimately the deposit of these sources will be finished on the other hand renewable sources of vitality will keep going forever eg. sun as a wellspring of vitality will be accessible for a significant stretch.

Exercise Discussion for Xam Idea Class 10 Science Solutions Chapter 14 – Sources of Energy

Very Short Answer Type Questions

In this section, you have to answer 18 questions each of 1 marks. This section mainly asks for the different types of energy sources and what they are called, like What are the different types of nuclear reaction, Name the two materials that are used for making calls.

Short Answer Type Questions- I

In this section, you have to go through 7 questions each of 2 marks. This section is mainly designed to make all the basic concepts clear like, State the important users of wind energy, give an example of the indirect harnessing of solar energy are some examples of the question that you have to go through in this section.

Short Answer Type Questions- II

This section contains 16 questions and each contains 3 marks. All the questions in this section are mainly designed to clear your reasoning section of that is there in this chapter.

Long Answer Type Questions

This section has 5 questions and each question is of 5 marks. This section is mainly designed to check how much you can attempt the question in detail. This section also has a question that asks for diagrams and the processes of different types of sources of energy.

HOTS (Higher-Order Thinking Skills)

In this section, you will get 3 questions and all these 3 questions are designed to check how deeply you read and understand the chapter.

Value-Based Questions

This section contains 2 questions that are mainly designed to check what values you learn from this chapter.

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