NCERT Solutions for Class 10 Science Unit 14

Sources of Energy Class 10

Unit 14 Sources of Energy Exercise Solutions

Sources of Energy
When we use energy in its usable form we convert the form of energy and get our work done during the process. Since we cannot reverse the change involved in this process so we cannot get back the original usable form of energy. Due to this, it becomes important to think about energy shortage and the related energy crisis.

Characteristics of a good source of energy:
  • It should be able to do large amount of work for each unit of mass or volume.
  • It should be easily accessible.
  • It should be easily transported.
  • It should be economical.
<< Previous Chapter 13 : Magnetic Effects of Electric Current Next Chapter 15 : Our Environment >>

Question : Solutions of Questions on Page Number : 243

Q1 :  

What is a good source of energy?


Answer :

A good source of energy fulfils the following criteria:

(I)It produces a lot of heat per unit mass.

(II) It does a huge amount of work per unit mass.

(III) It is easily accessible.

(IV) It is easy to store and transport.

(V)It is economical.

(VI)It produces less amount of smoke.

Answer needs Correction? Click Here

Q2 :  

What is a good fuel?


Answer :

A good fuel produces a huge amount of heat on burning, does not produce a lot of smoke, and is easily available.

Answer needs Correction? Click Here

Q3 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

What are the disadvantages of fossil fuels?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

Why are we looking at alternate sources of energy?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q7 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q8 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q9 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q10 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q11 :  

What is geothermal energy?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q12 :  

What are the advantages of nuclear energy?


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 13 : Magnetic Effects of Electric Current Next Chapter 15 : Our Environment >>

Questionexercise : Solutions of Questions on Page Number : 254

Q1 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q2 :  

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 :

Please Register/Login to get access to all solutions Facebook Login
Q3 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 13 : Magnetic Effects of Electric Current Next Chapter 15 : Our Environment >>

Exercise : Solutions of Questions on Page Number : 255

Q1 :  

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 :

Please Register/Login to get access to all solutions Facebook Login
Q2 :  

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 :

Please Register/Login to get access to all solutions Facebook Login
Q3 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

What are the limitations of extracting energy from -

(a) the wind? (b) waves? (c) tides?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

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 :

Please Register/Login to get access to all solutions Facebook Login
Q7 :  

What are the qualities of an ideal source of energy?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q8 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q9 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 13 : Magnetic Effects of Electric Current Next Chapter 15 : Our Environment >>

Science : CBSE NCERT Exercise Solutions for Class 10th for Sources of Energy will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

Popular Articles
Question
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Questionexercise
Question 1
Question 2
Question 3
Exercise
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9