Notes for sources of energy chapter of class 10 science. Dronstudy provides free comprehensive chapterwise class 10 Science notes with proper images & diagram.
Want to learn by Video Lectures? CLICK HERE to watch them
Sources of Energy
Energy plays a huge factor in our lives, providing comfort, increasing productivity and allowing us to live the way we want too. Energy lights our cities, powers our vehicles, used in cooking, manufacturing etc.
What is energy Crisis?
An energy crisis occurs when we all have a great need of fuel or electricity but does not have enough amounts of them. For example, a large portion of the energy we use is derived from oil. Some experts claim that we will run out of oil in just a few decades.
But why energy crisis occurs?
When we use energy in its usable form like in cooking, 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.
Good Source of Energy
Source of Energy
Sources of energy can be divided into two types:
Conventional sources of energy - Sources which are being used since long time like coal, wood, wind etc.
Non-conventional sources of energy - Sources whose use has started only recently like sun, wave etc.
Sources of energy can be categorized in one more way:
Renewable - Source which can last for a very long time. It’s supply is unlimited. They are also called non - exhaustible sources of energy. Examples of such type of energy resources are sun, wind, wood and wave etc.
Non- Renewable - Sources whose supply is limited and is likely to be finished one day. They are also called exhaustible sources of energy. Examples of such type of energy resources are coal, petrol etc.
Want to learn by Video Lectures? CLICK HERE to watch them
Conventional Sources of Energy
Fuels are such sources of energy which give heat energy on burning such as coal, petroleum, wood.
Properties of Good Fuel:
Fossil fuels:
These are the fuels formed from remains of dead plants and animals under the earth crust due to excessive pressure and temperature for millions of years.
Examples: Coal, Petroleum (Petrol, Diesel, Kerosene, LPG), Natural gas.
It is a most commonly and widely used source of energy. We can say that fossil fuel is a key factor for industrialization. But as it is a non-renewable source of energy, so must be used carefully.
Disadvantages of fossil fuel:
Uses of fossil fuels:
Thermal Power Plant:
Thermal power plant is a plant in which electricity is produced from fossil fuels mainly coal.
Working of Thermal Power Plant:
First the coal is burnt into the furnace of steam boiler. High Pressure steam is produced in the boiler. In turbine, this steam force rotates the turbine blades. As the turbine turns, it causes the generator to do its work and create electricity.
The transmission of electricity is more efficient than transporting coal or petroleum over the same distance. Therefore, many thermal power plants are set up near coal or oil fields.
Hydropower is electricity generated using the energy of falling and running water. It is a conventional source of energy. But it has been enhanced by use of modern technology.
Working of Hydropower Plant:
Dam / reservoir is made over a river to collect water in large amount. Water coming of high speed rotates the turbine which in turn activates a generator to produce electricity. Some hydroelectric power plants just use a small canal to channel the river water through a turbine.
It is a renewable source of energy. Quarter of India’s power supply comes from hydro power plant.
Want to learn by Video Lectures? CLICK HERE to watch them
Disadvantages of Hydro-Power Plant:
Biomass is a source of energy that is directly obtained from plants and animals such as wood, agricultural waste, gobar (cow-dunk).It produces less energy and releases lot of smoke.
Wood & Charcoal:
When wood is burned in limited oxygen, it looses water and other volatile substances, leaving charcoal behind.
Benefits of charcoal over wood:
Gobar and agricultural waste:
Gobar and agricultural waste is used to produce Bio-gas/ gobar gas.
How to produce Bio gas/ gobar gas?
Advantages of Bio-gas:
Bio gas is used for cooking purpose, for street lighting, generation of electricity.
We have been harnessing the wind's energy for hundreds of years. From old time windmills have been used for grinding grain, to lift water from well. But in modern times, wind energy is used to generate electricity.
Working:
The energy in the wind turns the turbine blades around the rotor. A shaft connects the rotor to a generator. So when the rotor turns, it spins a generator to make electricity. The electrical energy from the generator is transmitted along cables to a substation.
Individual wind turbines can be used to generate electricity on a small scale. To generate electricity on much larger scale, a large number of wind turbines grouped together sometimes known as wind farms.
Want to learn by Video Lectures? CLICK HERE to watch them
Advantages:
Disadvantages:
Non - conventional Sources of Energy
1. Solar energy
The sun is the main source of energy for all living beings on this earth. Even the energy in the fossil fuels has come from the sun. The sun has an endless reservoir of energy which would be available as long as the solar system is in existence.
It is renewable and non-conventional source of energy. Examples of solar energy are solar cooker, solar panel.
Solar Cooker:
A solar cooker is a device which uses the energy of direct sunlight to cook food. Interior of cooker is usually black in color as black color absorbs most of the energy. Plane mirror or concave mirror is fixed at top side of cooker. On the other side a transparent glass is placed. The light reflected from the plane mirror concentrates the solar energy inside the solar cooker which generates enough heat to cook food.
Solar Panel:
Solar panels are devices that convert solar light into electricity. Solar panels are comprised of several individual solar cells which are themselves made of silicon. The more light that hits a cell, the more electricity it produces.
Uses of Solar Panel:
Advantages of Solar Panel:
Want to learn by Video Lectures? CLICK HERE to watch them
Disadvantages of Solar Panel:
The oceans cover about 70% of the terrestrial area. They contain a lot of energy. A small part of it can be used. Energies which are technically available are the following:
a.Tidal energy b. Wave energy c. Ocean thermal energy
All these are renewable and non - conventional sources of energies.
a. Tidal Energy:
Due to gravitational attraction of moon(and even sum to some extent), the level of water in ocean changes twice in a day. When level of water is high, tides are high. When level of water is low, tides are low.
Dams or reservoirs are built near seashores to collect the water which comes during a high tide. Turbines in the barrier generate electricity as the tide floods into the reservoir. Once the tide outside the barrier has receded, water retained can then be released through turbines into ocean, again generating electricity.
Waves are created due to movement of wind on ocean surface. A variety of technologies have been proposed to capture the energy from waves. They can be used in several ways to rotate rotor of dynamo to generate electricity.
Ocean thermal energy is a renewable energy technology that harnesses the solar energy absorbed by the oceans to generate electric power. The Sun’s heat warms the surface water a lot more than the deep ocean water, which creates the ocean’s naturally available temperature gradient, or thermal energy.
Working:
For ocean thermal plant, temperature difference between hot and cold layer should be at least 20°C to vaporize a working fluid, which has a low boiling point, such as ammonia. The vapor expands and spins a turbine coupled to a generator to produce electricity.
The vapor is then cooled by seawater that has been pumped from deeper ocean layer. That condenses the working fluid back into a liquid, so it can be reused. This is a continuous electricity generating cycle.
Heat from the earth can be used as an energy source in many ways. This heat energy, known as geothermal energy.
This thermal energy is contained in the rock and fluids beneath Earth's crust. It can be found from ground to several miles below the surface, and even farther down to the extremely hot molten rock called magma. Earthquakes and magma movement break up the rock covering, allowing heated underground water or steam to accumulate on earth surface. This process is known as geyser and that region where hot water accumulates, is known as hot spring.
The hot water and steam can be tapped to generate electricity and for other work directly. In some geothermal plants, the steam trapped in rocks is routed through a pipe to a turbine and used to generate electricity.
Advantages:
Disadvantages:
Nuclear power is derived from energy that is released when relatively large atoms like atoms of uranium, thorium are split by shooting neutrons on them. In this process, one atom forms some small atoms, 3 neutrons and heat. The process of splitting an atom is known as nuclear fission. The resulting heat is used to boil water which drives a steam turbine to generate electricity.
Chain Reaction:
If we trigger one reaction of nuclear fission, chain reaction starts. In a chain reaction, particles released by the splitting of the atom strike other uranium atoms and split them. The particles released by this, further split other atoms in a chain process.
Want to learn by Video Lectures? CLICK HERE to watch them
Advantages:
1 Kg Uranium can light up 1 Bulb for 3 x 104 years.
Disadvantages:
Environmental Consequences
Thank you for the notes it was really helpful.
It was really helpful. Thanks for the notes.....
very nice notes for us
Niceeeeeeeeeee
Koka nice endless very easy
There are less advantages and disadvantages of some source like energy from the sea....
However thanks.......
Very nice video sir
Very easy explanation Thks a lot
it was so helpful during the time of exams
very nice notes
THANKS
IT WAS SO NICE
Thank u so much
It was so useful
Thank u so much
It was so useful
Excellent...notes were perfectly prepared.interesting to learn .......
Nice notes
This helped me a lot
It's very good notes
Goood
notes are really good and helpful.THANK U SOOOOOOOOO much
It's damn good...
Very good helps student
Very good helps to student
Give detailed information about nuclear fusion and fission
Good
very useful website! THANKS!
It is verrrrrry good I got a lot of help from it thankyou
its good
Thanks for the notes ...They are really helpful for me ...
Useful notes... Short but contains are good... I like it...also a special thanks. To the dronstudy to makes this..
tnkuu
Is nuclear power plant is in syllabus
Thankyou So Much these notes helped me alt..
Helpful notes
Its gorgeous but some point is not given.
its very easy to understand
its very nice and easy to understand
These notes are very helpful...
This is first site who gave me best notes. It is amazing
Sir your notes are fantastic but sir can we download it
thank u for notes
Niceeee
Its really very helpful.
its really very very good helping hand
Very easy ,simple and best notes
It's very very useful in studies
thanxxx
great
Very useful for me
Thanks
wowwwwwww
Great yaaa!!
It’s just amazing guys!!!!
Fab!!
It’s just amazing guys!!!!
Intresting notes, easy to understand, very useful.
Wonderful app I have never seened
fantistic very helpfull to me for understanding the chapter
Very nice notes and it was very helpfull for me
This is very helpful app for everyone.... thank you so much...
thank u for the notes...it helped me a lot
great work
hats off to dron study
cool
is it enough to study the chapter notes to secure good marks in class 10 exam
Thanks for the short ,important and precise points
It’s not that much helpful
Thanks
thanks so much
thanks
Easy to understand
Very nice notes waooooow
Very nice notes
Very help full for me to understand this chapter
Thanks a lot for the notes
Good notes and can u give it more specific but it's awesome
very easy to understand it's just Awwwwso
wooooow wooowwwwwwwwwwwwww its sooo coolll;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
very helpful for students
nice........
Usefulll
For everyone
we know it was usefulll for everyone .....post ur comments alone]]]]]]]]]]]]]]]]]]]]]]
It was great
Best notes
Nyc
Its short and according to need
Wonder full notes
nice..thanks...
Fantastic notes
This is full note of in this chapter
Well
This is good for revising in the last moment of exams.
Uh haven't explain about nuclear fission Nd fission
it helps a lot...
thankss
it is very niceeee
Excellent notes
Sir download Kasi kar am offline show nhi karta
It is good but want something more
Fabulous
These notes are interesting and I learn from these notes.
amazing notes i appreciate them
These notes helped me in impressing my teacher in azsignments
So thnx
thanks a lot it. helped me a lot in my xams
very helpful.It is amazing
Thank u
its really useful to us thank you very much
very helpful guyzzzzz..........
thanks
Thanx for the notes It was really very helpful for me
Thanks a lot for the notes It was really very helpful for me.
Thanxxx for the notes it was really helpful to me
excellent and best notes i have ever seen. these notes have helped me a lot. During exams when there is lack of time, then prefering to these notes would be the best. thanks dronstudy
I like it Dron study it's a very interesting application for good app
ITS REALY GOOD
Very nice easy understand
thanks for good notes
easy to understand
best
easy to uderstand . verryyyyy nice helpful as wellas good . i loved it.
thankyou...............
Shaandaar
wow...........
that's amazin'
wow...........
Love this site.... Very very veryyyyy helpful....
Thanks a lot to provide us notes of every Chapter ......this chapter notes are some short but that's are contain is awesome
Love you Dronstudy
It's better than other wow
good notes
Easy understanding
it is the easiest way to understand chapter quickly........
amazing
nice
Awesome I liked this
It was awesome. I found this side useful for students
Very clear with brief explanation
fantastic
It was really helpful to me to write my classwork within time....
AWESOME
Very very helpful
wowwwwwwwwwwwwwwwwwwwwwww
it helped a lot
the notes were helpful to me
it was really very helpful for me thanks
help a lot
thanks.......
thnx for the so precise and key points
very nice notes very useful
it's very helpful
this is very help full for me
Very nice
brilliant notes very much useful
the notes are owesome
Very nice
nice and useful
gud
very nice and useful thankyou
nice
Very good points and very helpful Thanks
Very easy point and nice nots.
Message*this is very helpful
notes are great
very nice
Fantastic
very nice
cool notes...
it's useful
thanks.....
I just love it, it helped me quickly study for my sa1 exam...
osm yaar
Notes very good
Tysm
Very easy language....students can learn in a better way by these notes.....
Nice notes
nice yr in the basis i learn extra
dab sh JJB
Mashah Allah!!?
Thank you so much..
It is very helpful and understandable to me in my exam time
Thank you so much !
All your chapter notes are just amazing! This brings us to a better way of learning important points before the examinations....Thanks a Ton!
it is fantastico
Awsome!!!!!
A huge thanks to the website.
Nice
nicee
very useful thanks
hey
I AM NOT ABLE TO DOWNLOAD THEMS NOTE
PLZ.. HELP ME OUT TO DOWNLOD THE NOTES ITS IS VERY GOOOOD AND NICE NOTES
PLZ.. HELP ME OUT THE SA1 IS NEAR
SO I THINK YOU WILL REPLY TO ME!!!!!!!!!!!!!!!:)
you have to buy the complete course.
Ya u have to buy complete course..... its paid
hey
i am not able to download his notes
plz...... help me out to download this notes 🙂
Awesome
Nicccceeeee
Nice
awesome notes and so easy language to understand. Thanks to dronstudy for notes
Wow..........superb notes thanks
really thanx for these great notes. i really got good knowledge from these notes.
rllyy...vry helpful
this notes very helpful .thank
ITS amazing it helped me in my board exams
THANKS ALOT 🙂
Thnxx for this...
It is very helpful... Very nice..
Nice
very helpful
excellent
nice and also provided by our school
It is helpful and easy to learn
i like it ..................................
these totally hep me for understand the chapter
nice
This is the best of all I've visited till now truly amazing......
Awesome
excellent! very useful
its too good
Its too good . it help me a lot for my Olympiad
very nice
Outstanding
thank u
thanks
It's gud
Good
You are write a very well
Excelent
its awesome i like ittt
its awesome.
This notes r fentasticoooooooo
it's really helpful
i like itttttttttttttttttttt...........................
It's brilliant
It is very nice, I was able to understand everything very easily.
its good
nice....
Good and helpful
its amazing.........
thank you it was useful
thanx a lot
Right way to serch
not so briefly described
Gud one...
ya its really very helpful thankew so much
easy to understand
These notes helped me a lot
It is helpful
THANKS a lot for AMAZING NOTES
Nice and helpful...
Nice
niccccc
good for study
very useful to students
This notes are very useful to me. But i couldn't copy or download it. How to copy or download the notes.
this notes are very useful to me.but i couldn't copy it. how to copy or download this notes.pls guide me.
nice it really helps to complete my homework
Thanks
Very nice
Very helpful
Super
thanks for share notes very helpful
Gud1. I seriously liked it....................................:)
Gud1. Usefull notes. I seriously liked it so much......:)
its amazing & easy to understand
it is good
Gòoooood
Amazing and useful..
Its amazing,easy to understand and mpst important helpful
nice
easy to understand
Great!
Amazing....!!!! ?
Awesome..!! ?
Awesome.......!!!! ?
very interesting
amazing
Very useful no need to buy a guide
Nice and it is worth and can get full marks in physics
awesomeeee
These are very helpful to me
Gud
Iam satisfied
aewsomeeeeeeeeeeeee
awesomeeeeeeeeeeeeeeeeee
this site is very good . this site help me every time thanks you
nice explained thanks for providing this to us
its aweome
excellent
mast
Awam
thank you for helping with such wonderful notes
It is very helpful to making my Holiday homework... Happy to find.. Thanx alot
Superb....
it is totally wonderful, it really helps me, thank you for your notes
Awsmmm easy too learn and understood.. thnxzz ds
Nice notes
thankzzzzzzz
thanks,really a great help 🙂
Wow so great
Woow so amazing
IT MADE ME UNDERSTAND VARY WELL
GOOD, IT MADE ME UNDERSTAND THIS CHAPTER VERY WILL!........... : )
Very helpful
Great.....!
sooooooo nice
Perfect notes
Easy 2 understand
Awesomeeeee
it gives me a confidense
it was WONDERFULL
sooooo helpful
its wonderful
Nice and useful
Nice
it's very he
awsom
IT's wonderful
Good
it's amazing
easy to understand.
nice
made the concept easier
veryyyyyyyyyy useful
Very... Useful......
Very useful.....
thanks
thanku
out standing
Mind Blowinggggggggggggggg
It so cool
Great!!!
good , very useful
Makes difficult concepts look easier
Very helpful
Awesome notes
Awesome class notes and helped me a lot
it's amazing
niceeeeeeee
Gud
nice
Fantastic
its amazing!
wowwwwwwww
this is so use full to us
easy 2 understand
Thankful for a great short points .......
nice
Very easy and good for studies
Thank you...
its totally amazing...
It. is a helpful website
Thank you very much !
Its awsm....
ya snekha....its awsm
Very helpfull
Osm . guys Really was a great help...
It's really very good.... U must learn from here
Wow..!!notes are amazing ..
have u dron study videos please reply me
Yes, here you can get all the chapter videos of class 9 and 10 of Maths and Science.
Very niceeeeeeep
Thanx a lot for the notes they are just amazing and helpful. By this i understood the chapter easily and i m looking forward for more such kind of notes... Once again I will say thanks ...
thanks a lot for the notes , really helped a lot
thanks for the notes really helpfu
very interesting notes
thank u
Thanks for notes it was very helpful for me pH : 8744889990
it is very useful for examination
thanks for notes .it was very helpful for me
Thanks for the notes
thnx
It was really helpful to me for writing my assignment.
Thnx for the notes