# CBSE Class 10 Science NCERT Solutions: Chapter 14, Sources of Energy

All the Class 10 students who are searching for comprehensive, precise and free solutions for Science NCERT book, we bring here the NCERT solutions exclusively prepared by subject experts at jagranjosh.com.

With the detailed and precise NCERT solutions provided here, solving the NCERT questions becomes quite easy and manageable task. Not only do these NCERT Solutions for Class 10 Science strengthen a student’s foundation in the subject, but also give them the ability to tackle different types of questions easily. This helps students prepare effectively for the exams and score good marks.

In this article we are providing the NCERT Solutions for CBSE Class 10 Science chapter 14, Sources of Energy. All the questions have been solved in the most appropriate and simple way so as to help students access the right study material for the exam preparation.

All the class 10 Science NCERT solutions have been collated in PDF format which students may easily download totally free.

Some of the questions and their solutions from NCERT Solutions for Class 10: Sources of Energy, are as follows:

Q. What is a good fuel?

Sol. A good fuel produces large amount of heat on burning. It is easily available & produces less smoke.

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

Sol. For heating and cooking food, natural gas can be used. This is because it is a clean source of energy. It produces less smoke on burning. Although it is highly inflammable, it is easy to use, transport, and it produces a huge amount of heat on burning.

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

Sol. Solar cooker works on the principle of solar energy. Thus, a mirror is required for focusing all the incident sunlight at a point. Concave mirror can be used for this purpose. The temperature at that point increases, thereby cooking and heating the food placed at that point.

NCERT Exemplar Solutions for CBSE Class 10 Science: All chapters

Q. 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

Sol. (c) Nuclear energy

Q. What are the limitations of extracting energy from −

(a) The wind? (b) Waves? (c) Tides?

Sol. (a) Wind energy is harnessed by windmills. One of the limitations of extracting energy from wind is that a windmill requires wind of speed more than 15 km/h to generate electricity. Also, a large number of windmills are required, which covers a huge area.

(b) Very strong ocean waves are required in order to extract energy from waves.

(c) Very high tides are required in order to extract energy from tides. Also, occurrence of tides depends on the relative positions of the Sun, moon, and the Earth.

Get the complete the NCERT solutions for Class 10: Sources of Energy, from the following link:

Class 10 Science NCERT Chapter: Sources of Energy

Before solving the questions given in the Class 10 Science NCERT chapter- Sources of Energy, students should thoroughly read this chapter to grasp all the concepts explained in it. This will help you understand the problem discussed in a question and then come with an appropriate answer.

Main topics discussed in Class 10 Science chapter: Sources of Energy are:

• What is a good source of energy?
• Conventional sources of energy

Fossil fuels

Thermal power plant

Hydro power plants

• Improvements in the technology for using conventional sources of energy
• Alternative or non-conventional sources of energy

Solar energy

Energy from the sea

Geothermal energy

Nuclear energy

• Environmental consequences