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Generation and recombination in semiconductors| Class 12 (India) | Physics | Khan Academy 

Khan Academy India - English
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In this video let's figure out how people calculate the number of electrons and holes in an intrinsic semiconductor at any given temperature.
Learn the next topic here --www.khanacadem...
Class 12 Semiconductors: We cannot imagine our life without computers today. But what makes a computer tick? What's making this technology grow at such an exponential rate? It's all due to semiconductors. As unbelievable as that might sound, altering the properties of semiconductors allows us to build these computers. In this topic, we will explore the world of semiconductors. It's a journey from what semiconductors are all the way to creating building blocks of these computers.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Created by Mahesh Shenoy

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16 окт 2024

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Комментарии : 63   
@DavidWilliams-vp9xu
@DavidWilliams-vp9xu 5 лет назад
Growing up and using RU-vid for stupid crap like Evolution of Dance (which is still a gem), I never thought that a RU-vid channel would make my college degree possible. Wow. Thank you sir. So brilliantly clear.
@imcatwoman3738
@imcatwoman3738 Год назад
I have attended several lecs on this topic in some i just slept cuz they were sooooo boring and inaccurate cant tell u what good this has done to me can finally start pyqs and 12th ques😭thanks!!!
@sujithlalsnair7845
@sujithlalsnair7845 2 года назад
The last segment of explanation was astonishing... This is how we can understand the real mystery of science... GOOD JOB...
@amrohendawi6007
@amrohendawi6007 6 лет назад
beautiful lecture !!!! you saved me hours of research !! wish Khanacademy where in germany too :(
@NeoPh03nix-lk8fc
@NeoPh03nix-lk8fc 4 года назад
hello i want to ask something how can i contact you
@apahna4ka
@apahna4ka 5 лет назад
Finally a clear explanation! Thanks a lot :)
@tejakrishna803
@tejakrishna803 2 года назад
Next level of teaching. Salute sir for all your efforts to help students.
@SeerusArtRoom
@SeerusArtRoom 10 месяцев назад
sometimes I feel like physics teachers on RU-vid become a little too relatable that we forget the actual concept we're trying to learn...of my 4 years of RU-vid learning, I had never found the perfect balance between fun and study....until now! this is the raam baan for physics🛐 thank you sirrr
@nehapal6888
@nehapal6888 3 года назад
Wow!!! Thats amazing u teach in a very easy manner it's like I'm enjoying learning physics ..😇😇😇
@chiranjibimahapatra708
@chiranjibimahapatra708 Год назад
This is called a teaching standard which many youtuber lack while teaching they just jump to equation as if they discovered it😂.I love you ❤❤
@mibrahim4245
@mibrahim4245 2 года назад
I wished I knew this channel when I was at year 2 electrical engineering ....
@Inja_Elnaz
@Inja_Elnaz Год назад
this description for semiconductor was one the bests.
@260eeeprasuna2
@260eeeprasuna2 4 года назад
Your explanation is awesome and we are able to understand the concept well
@hugojj101
@hugojj101 2 года назад
Great video, at some point, moles jumping out of hot soil popped into my head and then i guess, they create so many and can't see, they keep falling back in but because the ground is so hot, despite the number of moles and holes, there is always a certain amount of moles on the surface because the soil is that hot and we got so many moles jumping out. No way I'm forgetting this now and it's really interesting and fundamental to computer science so that's nice.
@KamalElias99
@KamalElias99 4 месяца назад
very nice
@shaikrafiq9498
@shaikrafiq9498 4 года назад
Hope we have u in andhrapradesh ....kurnool ...aakash college ......u r brilliant ...amazing
@HailG3
@HailG3 5 лет назад
Thank you so much! My professor is shit but thanks to this I finally managed to understand so many things
@Just_Juno04
@Just_Juno04 3 года назад
Thank you for such an amazing video👍🙏
@alokjha7848
@alokjha7848 4 года назад
You made it very easy to understand
@prishiakanksha3771
@prishiakanksha3771 5 лет назад
This lecture is unavailable in the app. Please fix this problem.
@shiwamkarn5215
@shiwamkarn5215 3 года назад
omg ..ur explanations are ewally amazing
@shivaniteli8270
@shivaniteli8270 2 года назад
Such an amazing video!! Very very interesting....tysm!!
@pagratiospapadopoulos6722
@pagratiospapadopoulos6722 4 месяца назад
hi, probably heard the same question again, what software do you use to present such beatiful classes?
@Priyanshu_Kumar_Pandey
@Priyanshu_Kumar_Pandey 5 месяцев назад
Thank you so much sir😀🙏
@TheRetirementRoadmap
@TheRetirementRoadmap 5 лет назад
Standing ovation
@pravallikatankala7869
@pravallikatankala7869 2 года назад
Plzz.....post videos on the concept Nuclei
@jiafatima4178
@jiafatima4178 4 года назад
Very good....concept and speach both are awesome
@ismatararoksana8088
@ismatararoksana8088 5 лет назад
You made an excellent video but it was not included on the Semiconductor series at Khan Academy.
@KhanAcademyIndiaEnglish
@KhanAcademyIndiaEnglish 5 лет назад
What do you mean? You can find all these videos on Khan Academy website :)
@ismatararoksana8088
@ismatararoksana8088 5 лет назад
This series is supposed to be in Class 12 physics India Semiconductor series. It is supposed to be before the lecture minority charge carrier. That's why I said that.
@KhanAcademyIndiaEnglish
@KhanAcademyIndiaEnglish 5 лет назад
@@ismatararoksana8088 Ah, thanks a lot for pointing that out. I am going to do immediately :)
@ismatararoksana8088
@ismatararoksana8088 5 лет назад
Thanks Khan Academy. Your videos are great.
@OlivierGeorg
@OlivierGeorg Год назад
Now, _this_ is physics
@gauravtandon3201
@gauravtandon3201 3 года назад
You made this so easy ❤️
@kavehzaf3877
@kavehzaf3877 3 года назад
What are the units in this video? what is the unit for generation? is it number of holes? also rate of generation and... It gives a perspective what the f(t)=con *n_i^2 means....
@kazukawasaki97
@kazukawasaki97 7 дней назад
generation is the rate at which thermal energy excites electron to conduction zone/band,when that is equal to the recombination rate(the rate at which electrons release/emmit their energy back and settle into the bonding delocalized orbital) that gives you the equilibrium equation, using that we can get the number of electrons that are not changing with time,the generation and recombination rates then are obviously frequencies numbers per second which if you want probably can use hertz idk any other notation for frequency where as the end result obviously is the number of conductive electrons
@kazukawasaki97
@kazukawasaki97 7 дней назад
and holes ig,its still pretty weird I don't like the concept of holes, make you think more
@nancykhosla5024
@nancykhosla5024 6 лет назад
That was a really good explanation.......thank you for sharing
@p.harika
@p.harika 4 года назад
For conduction charge carriers need to be in conduction band right then why not the holes are in conduction band and electrons are.
@lewtube6436
@lewtube6436 Год назад
Beautifully explained sir. I have already seen many videos in this series and they are all deserve top commendation. So this comment could be repeated for all of them.Thanks.
@islamreviolution
@islamreviolution 5 лет назад
But this say that holes is in greater quantity why this happen some says holes are heavily and highly doped region plz clear this point
@rhyvia2185
@rhyvia2185 23 дня назад
Omg love it! thank you so much ! i can finally understandt it 🫠
@DisiCoco-nm2gw
@DisiCoco-nm2gw 19 дней назад
How that emoji you do puta 😮
@rudratechpoint4060
@rudratechpoint4060 3 года назад
How light energy is produced during whole process...
@adityadutta2391
@adityadutta2391 5 лет назад
This is amazing
@PCS520
@PCS520 Год назад
On y axis represent Energy on X axis
@ksanjeev284
@ksanjeev284 5 лет назад
Thanks
@raymonddexter5738
@raymonddexter5738 5 лет назад
But p type has holes in valence band not conduction band how does electric field cause current
@alison1183
@alison1183 3 года назад
Kindly, the original atoms yes they are 10 to power 22. But only 10 to power 10 atoms for example in Si contribute to the conduction as the rest are sitting at the top of the parabolic curve of the conduction band. Therefore, every atom still shares (1 to 4) valence electrons with other atoms not every 10 to power 22 contribute with only one e and h. It's non-sense. Semiconductors are called so because of their conductivity comparing to metals. The conductivity is due to their bandgap. While metals don't have bandgap since the conduction and valance bands are overlapped. Thanks
@srilakshmidevulapalli6999
@srilakshmidevulapalli6999 8 месяцев назад
🙏🙏
@JustwaitNwatch-w
@JustwaitNwatch-w 2 года назад
Better than physics wallah
@ambikathakur8794
@ambikathakur8794 6 лет назад
Thanks sir as 😄😄😄
@ambikathakur8794
@ambikathakur8794 6 лет назад
Who 👻👻 likes
@raskkas6201
@raskkas6201 4 года назад
how 10*22 atom contributes 10*10 electrons why not 10*22 electrons?
@saketkumar4972
@saketkumar4972 4 года назад
stop copying sal, its irritating
@shaikrafiq9498
@shaikrafiq9498 4 года назад
🤦‍♀️
@AS-nx9fu
@AS-nx9fu 3 года назад
Fake accent lmfao
@breakcoregirlxd
@breakcoregirlxd 3 года назад
its a very good way of making learning easier
@AS-nx9fu
@AS-nx9fu 3 года назад
@@breakcoregirlxd no it isn't lmao
@ajaykrishnanvs7954
@ajaykrishnanvs7954 2 года назад
No one cares bro. He is teaching well and thats what matters
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