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Transistor working | Class 12 (India) | Physics | Khan Academy 

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Let's explore what transistors are and they (more specifically a Bipolar junction transistor) work as an amplifier.
Learn the next topic here --www.khanacademy.org/science/i...
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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17 апр 2018

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Комментарии : 194   
@BharathinfinityHegde
@BharathinfinityHegde 4 года назад
i wasted hours and hours trying to make sense of the absolute madness that NCERT is, when i could've just watched a 11min video....a simply brilliant explanation
@OmarKhan-ds1si
@OmarKhan-ds1si 3 года назад
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@revanthreddy5239
@revanthreddy5239 3 года назад
Dude NCERT is not mad. A book is never mad, every book is great and special in its own way
@teratrox4685
@teratrox4685 2 года назад
@@revanthreddy5239 NCERT is a joke. Not all books are divine. If you are still adamant that every book is special, I'd like to know how you feel about Mein Kampf.
@rishabhranjan5162
@rishabhranjan5162 2 года назад
@@teratrox4685 Ok clown🤡
@siddharthamondal4346
@siddharthamondal4346 2 года назад
@@teratrox4685 I agree with you. Such a weird book. Never updated even once moreover many erratic piece of information given in NCERT. Our chem sir hunted lots of misinformation in NCERT
@thunderbolt6276
@thunderbolt6276 5 лет назад
No lecture can match urs not even the paid ones hats off💂
@shiwamkarn5215
@shiwamkarn5215 3 года назад
true
@meghwati8373
@meghwati8373 3 года назад
I almost felt like crying 'cause i couldn't understand the concept of transistor no matter how many videos i watch, no matter how many times my teacher explains to me. This video cleared all my confusion and gave a very clear explanation. Also, when the teacher in the video explains things he sounds so excited and happy that it makes me feel like I am actually studying something very exciting. Thank you for this video. It saved my day.
@furiousarpan7473
@furiousarpan7473 Год назад
He is the king
@sanjanasathsarani3573
@sanjanasathsarani3573 7 месяцев назад
I can understand the the feeling we both were in the same boat before watching the video
@Rohan_Verma__25
@Rohan_Verma__25 Месяц назад
Really bro For me transistor is very tough in entire 12th physics
@pritisarmah1688
@pritisarmah1688 5 лет назад
This is the only vid in RU-vid which made my understand the concept. Thanks a lot😁
@260eeeprasuna2
@260eeeprasuna2 3 года назад
I'm very possessive soo that's the reason I won't suggest anyone to watch your videos cause you are the best best best teacher in my life.... And your teaching is damn excellent... 👍🏻
@fahimm3905
@fahimm3905 Год назад
Long story short: EXCELLENT teaching technique and the way to approaching to the key concept is just mind blowing! 😳
@rajangidwani2007
@rajangidwani2007 5 лет назад
You have been my motivation ! I have been loving physics since I started watching your videos. 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
@Spear8
@Spear8 Год назад
i cant tell u how thankful i am . i will definitely try to help you guys when I start earning on my own . Your that physics teacher we never knew we wanted
@shiwamkarn5215
@shiwamkarn5215 3 года назад
finally i found a teacher who teaches in the way i wanted to learn..thank u so much bhaiya ..love u soo much
@sanjanasathsarani3573
@sanjanasathsarani3573 7 месяцев назад
i actually do not have words to say ... i wasted lot of time to grap the thing inside a transister and finally i can rest in peace ....THANK YOU VERY MUCH
@manjumk0501
@manjumk0501 4 года назад
Simply wonderful.. Thank you soo much.
@saturnjupiter6837
@saturnjupiter6837 2 года назад
This is probably the best video on transistor... I totally wasted hours to understand this concept but i couldn't. This video cleared the concept within 11 minutes .
@Tanmoybag100
@Tanmoybag100 6 месяцев назад
Yes. In very less time you explained a difficult topic. Thank you so much.. Teaching tools are also great.
@arunasolanki3034
@arunasolanki3034 5 лет назад
It's really concept clearing.
@vishnuprasadspillai2002
@vishnuprasadspillai2002 3 года назад
Great video.. I ended up here to understand this thing... A crystal clear approach.. Thank you Khan Academy...
@rishujain0721
@rishujain0721 3 года назад
Best conceptual videos on semiconductors on this channel..👍👍👍
@patakotisrinivas1918
@patakotisrinivas1918 2 года назад
Beautifully explained, as it explained practical example...hats off to u r lecture...really awesome
@manjeiy2453
@manjeiy2453 8 месяцев назад
Alhamdullilah ☝️❤ now i have understood amplification atleast....thank you so much mister
@08athakwaninandish16
@08athakwaninandish16 2 года назад
बहुत ही अच्छा और अतुलनीय विवरण दिया गया है।
@sreehariharikumar5865
@sreehariharikumar5865 7 месяцев назад
Simply brillant! LOVED IT❤
@jauhark7746
@jauhark7746 5 лет назад
Now i know what transistor actually do....thanks dude😊
@rajobakhatun2201
@rajobakhatun2201 3 года назад
if there had had a way to rate, I would have rated this video 10 out of 10 over this topic! Honestly all of my confusions have gone over it, thanks💝
@priyeshvishwakarma2655
@priyeshvishwakarma2655 2 года назад
Great explanation sir ,this is what I needed 🙏❤️
@shrutishankar2158
@shrutishankar2158 4 года назад
I don't understand how the recombined electrons would give rise to base current..
@shafiajabeen9785
@shafiajabeen9785 3 года назад
What good have i done to deserve you Khan academy❤️. thank u Soo Soo much
@rameshjain17
@rameshjain17 5 лет назад
What a explaination ! ❤️ Hats off 🔥
@ismailb4334
@ismailb4334 5 лет назад
Preparing for the first midterms?
@caghey
@caghey 2 месяца назад
istg bestest teacher ever on electronics
@ahmadeldesokey9844
@ahmadeldesokey9844 5 лет назад
Best video on transistors .♥♥
@boobalang9997
@boobalang9997 5 лет назад
Great.👌👌
@ayushchoubey635
@ayushchoubey635 2 года назад
Teachers like this are blessing to humanity
@patelrushil3323
@patelrushil3323 5 лет назад
Very well teached !
@thrupthishetty896
@thrupthishetty896 5 лет назад
Omy god his explanation is so awesome
@mohitgrover1915
@mohitgrover1915 2 года назад
Finally got the best channel after watching sooooo many videos..🙏🙏💯💯💯
@tahmidislamtasen1602
@tahmidislamtasen1602 10 месяцев назад
Best video on transistor on the internet 🎉
@jamnachoudhary5243
@jamnachoudhary5243 3 года назад
your explanation is awesome ............ so,thanks sir😊😊
@sujithgowdakr46
@sujithgowdakr46 Год назад
Really ... khan academy videos are the best .... the explanation of theory is so good . I wasted many hours in understanding this concept. But here I got the concept within 10 min . Thank you khan academy
@pamudusachintha5869
@pamudusachintha5869 4 месяца назад
Great explanation..Nothing can match that
@varunsingh8322
@varunsingh8322 3 года назад
that was phenomenal
@Aditya-ir1ko
@Aditya-ir1ko 2 года назад
Sir these are the things which makes my concept in ECE luv from nit kkr
@Physicssimplifiedbyshivam
@Physicssimplifiedbyshivam Год назад
Your explanation is the best on you tube. Thank you
@cocorobinson4420
@cocorobinson4420 Год назад
Excellent video I love the way it all came together at the end
@TheMariapparaj
@TheMariapparaj 10 месяцев назад
Very simple and brilliant explanation.
@Shrimzys_Buttplug
@Shrimzys_Buttplug Год назад
i paid for a course and they failed to teach me. they are no way near this clearer explanation. thank you brother for making our life easier.
@dishajha815
@dishajha815 2 года назад
Brilliant explaination ,,, thanx a lot 😭
@vijaypanta9778
@vijaypanta9778 4 года назад
Masterpiece.
@shivangsingh2329
@shivangsingh2329 3 года назад
This is just like gift from god. Feels like only thing i needed
@beautlin3652
@beautlin3652 5 лет назад
I'm very lucky to see this video😍😍 But my friends don't 😈😈
@akbarrahmatullah6701
@akbarrahmatullah6701 4 года назад
Well explained.
@dharmendrarathod3753
@dharmendrarathod3753 2 года назад
Love your channel sir. ❤ 👏 🙌 👌
@hirunrashentha1082
@hirunrashentha1082 3 года назад
Great explaination 💪👌
@Skz716
@Skz716 Год назад
Sir I thank you from bottom of my heart.❤️
@krithikashree1957
@krithikashree1957 7 месяцев назад
perfect explanation with a nice example👏
@whiskyguzzler982
@whiskyguzzler982 4 года назад
When peeps google Transistor they should be pointed here. Wonderful and easy to understand.
@eliasthurner7142
@eliasthurner7142 Год назад
very well said
@cyndia3663
@cyndia3663 3 года назад
thank you so much for this and btw i like your handwriting :D
@bhuvaneshwarisaravanan9682
@bhuvaneshwarisaravanan9682 3 года назад
Super explanation.....
@tusharchaudhari8107
@tusharchaudhari8107 5 месяцев назад
Absolutely insane🤯🤯🤯🤯
@vishwanathkaleeswaran9528
@vishwanathkaleeswaran9528 5 лет назад
Well explained
@phalgunarao5877
@phalgunarao5877 Год назад
Great explanation sir.
@harindudilipa1559
@harindudilipa1559 5 лет назад
It would be even great if u answer peoples question in comments khan acadamy
@allrounder2367
@allrounder2367 2 года назад
Kindly explain more how an electron must go under recombination to be attracted from the base voltage?
@mosalah151
@mosalah151 7 месяцев назад
Incredible explanation
@xcross8537
@xcross8537 5 лет назад
Good job 👏
@niranjan7457
@niranjan7457 3 года назад
Sir, at 04:55, you mentioned that no amount of supplied voltage would cause flow of electrons due to the presence of the barrier in the PN Junction. But a PN Junction is weakened by increasing voltage, right? So doesn't a weak barrier result in more flow of electrons sir? Kindly clarify
@KhanAcademyIndiaEnglish
@KhanAcademyIndiaEnglish 3 года назад
There are two barriers, right? Almost all the supplied voltage comes across the top barrier (collector/base junction) reverse biasing it. The lower PN barrier (Emitter/base junction) is pretty much unaffected, and so electrons cannot be pulled out.
@ianbrewis8354
@ianbrewis8354 2 года назад
I was thinking the same thing thanks for the explanation.
@nipunijayarathne2028
@nipunijayarathne2028 5 лет назад
Woooow thankss
@dawnwatching6382
@dawnwatching6382 Год назад
Great stuff, Mahesh up there as one of Khan Academy's best instructors!
@khawjariyaz511
@khawjariyaz511 Год назад
Honestly better than physics wallah but underrated due to less drama... He gives education not drama
@sabassrana6768
@sabassrana6768 2 года назад
I can just say a huge huge thnx sr
@tasnimul0096
@tasnimul0096 Год назад
great lecture sir!!
@tobiefy
@tobiefy 2 года назад
I finally got it!
@so.meYeah
@so.meYeah 2 года назад
I don't know why most of the books teach this theory using the direction of current. It is more convenient to learn this part using the direction of flow of electron. I wasted hours to understand it until I came across this video. Thank You... Nothing Like This Channel...♥️
@jayantverma3313
@jayantverma3313 4 года назад
perfect
@amitkumarsaroj6071
@amitkumarsaroj6071 2 года назад
Thank You so much sir 🥰🥰🥰🥰🥰 Really very well explained
@michaelcummings6178
@michaelcummings6178 3 года назад
A lot of this has to do with proper polarization from external power sources to properly bias the devices
@shawarmasharma4293
@shawarmasharma4293 Год назад
OH MY GODD BRO YOU ACTUALLY MADE IT SO EASY GODDAMNN, ITNI SI BAAT MERA FACULTY SAMJHA NAI PARA THA
@roopas8462
@roopas8462 4 года назад
how does electron get pulled out if it recombines. shoudnt it form covalent bond
@gayathribhat6323
@gayathribhat6323 Год назад
wow just wow
@akashrawat29227
@akashrawat29227 4 года назад
Best explanation
@miyurusam
@miyurusam 3 года назад
Sir is it possible to make an overview video of electronics?
@akashhera
@akashhera 7 месяцев назад
Finally I understood how a transistor works! Hats off😍
@Msmsm184
@Msmsm184 4 месяца назад
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-pqeb66xrkbE.htmlsi=BhPuTiSGQulM87F2
@Shubham-rl7zw
@Shubham-rl7zw 3 года назад
Sir you said we have to connect speakers on +5 V side so that we get higher current or voice but how could the current or sound come out from +5v side becuase from that side their is movement of electron occuring so current will move opposite to that direction ... Please clear this doubt sir
@cheese348
@cheese348 Год назад
Mahesh thank you so much, I love you man!!! ❤❤
@markszlazak
@markszlazak 3 года назад
Will you add some lectures on JFET's and MOSFET's?
@jashkadu8618
@jashkadu8618 5 лет назад
Excellent video
@yewedmund
@yewedmund 3 года назад
If the sound to the mic is very loud to a point that makes the voltage higher than 5V, what would happen? since now the reverse bias becomes forward bias on top
@revitharevitha5356
@revitharevitha5356 5 месяцев назад
We could add a resistor so that it doesn't exceed 5V.We could make the voltage drop
@fl7866
@fl7866 4 года назад
The video is great!! But why is it necessary for the electrons to undergo recombination in order to get pulled out?
@OmarKhan-ds1si
@OmarKhan-ds1si 3 года назад
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@gauravav1635
@gauravav1635 2 года назад
@@OmarKhan-ds1si same doubt
@lakshitadixit5
@lakshitadixit5 Год назад
@@OmarKhan-ds1si because 0.7 V is the breaking voltage for silicon diode, means it cannot pass the the potential barrier which is the in built electric field in a PN junction from N to P which repels the flow of holes from P to N so in order for the holes to pass from P to N a voltage of 0.7 volt is required for a silicon diode doped with phosphorus and boron.
@lakshitadixit5
@lakshitadixit5 Год назад
@@OmarKhan-ds1si there is no potential barrier bw the metallic plate and N so electrons can be pulled easily
@lakshitadixit5
@lakshitadixit5 Год назад
Because recombination destroys holes and electron so for every electron destroyed another electron gets pulled and then the electron that gets pulled generates a new hole.
@Ruktiet
@Ruktiet 5 лет назад
Thank you :)
@CYB3r_D3m0n
@CYB3r_D3m0n 5 лет назад
Lit🔥🔥
@mdsakilbhuiya8689
@mdsakilbhuiya8689 3 года назад
You are really a great teacher
@snowboarder1pro
@snowboarder1pro 2 года назад
Thanks
@advaitagautam3505
@advaitagautam3505 Год назад
thank youuu 😄
@bonexs3294
@bonexs3294 Год назад
Sir, please do course video on electronics and communication
@freidarhealness5216
@freidarhealness5216 5 лет назад
The transistor is probably the most genius invention in the history of human beings.
@DrAdityaReddy
@DrAdityaReddy Год назад
The diode is. imo
@yujisaito3297
@yujisaito3297 4 года назад
Can you please make a video about thyristor?
@nitika9769
@nitika9769 Год назад
Will this transistor mal function when all the wholes are recombined with in p region?
@alishaanjum1108
@alishaanjum1108 Год назад
Why recombination is imp in p region for electrons to get pulled out from it
@sakshi6532
@sakshi6532 Год назад
Imagine getting like from this guy behind this legendary vedio
@user-hu8zj2ky1n
@user-hu8zj2ky1n 5 месяцев назад
ye lecture sunte huwe rona a rha tha k humy q aise teachers nahi milte 😢
@dawitabebe
@dawitabebe 5 месяцев назад
''When u think about sth u don't understand, u hv a terrible Uncomfortable feeling called Confusion some times it is very difficult and unhappy buisness ''
@OmarKhan-ds1si
@OmarKhan-ds1si 3 года назад
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@ricomajestic
@ricomajestic 2 года назад
Depletion layer in base emitter junction is too large and 5V are not being applied to the base-emitter!
@shanmugase333
@shanmugase333 5 лет назад
fun classsssss
@ganeshbodepu9845
@ganeshbodepu9845 3 года назад
At 8:25 mins, when you talk about the small fraction of recombined electrons and as a result get pulled out of the base. Why would they be pulled out after recombining?
@deeCodes-1
@deeCodes-1 2 года назад
I don't think every electron gets the chance to recombine because P region is very lightly doped. And before an electron gets the chance to recombine, it might get pulled into the 0.7v terminal because the probability of recombination is very less here.
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