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-ds1si4 жыл бұрын
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@revanthreddy52393 жыл бұрын
Dude NCERT is not mad. A book is never mad, every book is great and special in its own way
@teratrox46852 жыл бұрын
@@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.
@rishabhranjan51622 жыл бұрын
@@teratrox4685 Ok clown🤡
@siddharthamondal43462 жыл бұрын
@@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
@thunderbolt62766 жыл бұрын
No lecture can match urs not even the paid ones hats off💂
@shiwamkarn52153 жыл бұрын
true
@meghwati83733 жыл бұрын
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 Жыл бұрын
He is the king
@sanjanasathsarani357310 ай бұрын
I can understand the the feeling we both were in the same boat before watching the video
@Rohan_Verma__254 ай бұрын
Really bro For me transistor is very tough in entire 12th physics
@pritisarmah16885 жыл бұрын
This is the only vid in KZbin which made my understand the concept. Thanks a lot😁
@260eeeprasuna24 жыл бұрын
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 Жыл бұрын
Long story short: EXCELLENT teaching technique and the way to approaching to the key concept is just mind blowing! 😳
@rajangidwani20075 жыл бұрын
You have been my motivation ! I have been loving physics since I started watching your videos. 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
@shiwamkarn52153 жыл бұрын
finally i found a teacher who teaches in the way i wanted to learn..thank u so much bhaiya ..love u soo much
@Spear82 жыл бұрын
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
@sanjanasathsarani357310 ай бұрын
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
@saturnjupiter68372 жыл бұрын
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 .
@iamtb1009 ай бұрын
Yes. In very less time you explained a difficult topic. Thank you so much.. Teaching tools are also great.
@manjeiy245311 ай бұрын
Alhamdullilah ☝️❤ now i have understood amplification atleast....thank you so much mister
@pamudusachintha58698 ай бұрын
Great explanation..Nothing can match that
@rameshjain176 жыл бұрын
What a explaination ! ❤️ Hats off 🔥
@ismailb43346 жыл бұрын
Preparing for the first midterms?
@tahmidislamtasen1602 Жыл бұрын
Best video on transistor on the internet 🎉
@shafiajabeen97853 жыл бұрын
What good have i done to deserve you Khan academy❤️. thank u Soo Soo much
@caghey5 ай бұрын
istg bestest teacher ever on electronics
@moody261Ай бұрын
Wohh .. first time lecture on black screen seemed really interesting.. wanna watch others of your too
@rajobakhatun22013 жыл бұрын
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💝
@08athakwaninandish162 жыл бұрын
बहुत ही अच्छा और अतुलनीय विवरण दिया गया है।
@so.meYeah2 жыл бұрын
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...♥️
@sujithgowdakr46 Жыл бұрын
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
@fl78664 жыл бұрын
The video is great!! But why is it necessary for the electrons to undergo recombination in order to get pulled out?
@OmarKhan-ds1si4 жыл бұрын
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@gauravav16352 жыл бұрын
@@OmarKhan-ds1si same doubt
@lakshitadixit5 Жыл бұрын
@@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 Жыл бұрын
@@OmarKhan-ds1si there is no potential barrier bw the metallic plate and N so electrons can be pulled easily
@lakshitadixit5 Жыл бұрын
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.
@vishnuprasadspillai20023 жыл бұрын
Great video.. I ended up here to understand this thing... A crystal clear approach.. Thank you Khan Academy...
@dawnwatching63822 жыл бұрын
Great stuff, Mahesh up there as one of Khan Academy's best instructors!
@khawjariyaz511 Жыл бұрын
Honestly better than physics wallah but underrated due to less drama... He gives education not drama
@TheMariapparaj Жыл бұрын
Very simple and brilliant explanation.
@sreehariharikumar586510 ай бұрын
Simply brillant! LOVED IT❤
@ayushchoubey6352 жыл бұрын
Teachers like this are blessing to humanity
@niranjan74573 жыл бұрын
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
@KhanAcademyIndiaEnglish3 жыл бұрын
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.
@ianbrewis83543 жыл бұрын
I was thinking the same thing thanks for the explanation.
@mohitgrover19153 жыл бұрын
Finally got the best channel after watching sooooo many videos..🙏🙏💯💯💯
@aashibbalochАй бұрын
Finally understood the concept
@Aditya-ir1ko3 жыл бұрын
Sir these are the things which makes my concept in ECE luv from nit kkr
@krithikashree195710 ай бұрын
perfect explanation with a nice example👏
@Skz716 Жыл бұрын
Sir I thank you from bottom of my heart.❤️
@shivangsingh23294 жыл бұрын
This is just like gift from god. Feels like only thing i needed
@rishujain07213 жыл бұрын
Best conceptual videos on semiconductors on this channel..👍👍👍
@akashhera11 ай бұрын
Finally I understood how a transistor works! Hats off😍
OH MY GODD BRO YOU ACTUALLY MADE IT SO EASY GODDAMNN, ITNI SI BAAT MERA FACULTY SAMJHA NAI PARA THA
@Physicssimplifiedbyshivam Жыл бұрын
Your explanation is the best on you tube. Thank you
@patakotisrinivas19182 жыл бұрын
Beautifully explained, as it explained practical example...hats off to u r lecture...really awesome
@cyndia36633 жыл бұрын
thank you so much for this and btw i like your handwriting :D
@allrounder23672 жыл бұрын
Kindly explain more how an electron must go under recombination to be attracted from the base voltage?
@RazaDarain8 ай бұрын
I'm lucky to be here 😊
@tusharchaudhari81079 ай бұрын
Absolutely insane🤯🤯🤯🤯
@shrutishankar21584 жыл бұрын
I don't understand how the recombined electrons would give rise to base current..
@SajjadKhan-jx4qlКүн бұрын
Electrons are attracted by the 0.7 V from base
@eliasthurner7142 Жыл бұрын
very well said
@mosalah15110 ай бұрын
Incredible explanation
@yewedmund3 жыл бұрын
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
@revitharevitha53568 ай бұрын
We could add a resistor so that it doesn't exceed 5V.We could make the voltage drop
@michaelcummings61783 жыл бұрын
A lot of this has to do with proper polarization from external power sources to properly bias the devices
@cheese348 Жыл бұрын
Mahesh thank you so much, I love you man!!! ❤❤
@Starryskies2682 жыл бұрын
I finally got it!
@I20PH039SuryaPrakashG Жыл бұрын
recombined electrons become neutral, how they can be pulled out left side? anyone please
@tasnimul0096 Жыл бұрын
great lecture sir!!
@priyeshvishwakarma26552 жыл бұрын
Great explanation sir ,this is what I needed 🙏❤️
@sabassrana67682 жыл бұрын
I can just say a huge huge thnx sr
@whiskyguzzler9824 жыл бұрын
When peeps google Transistor they should be pointed here. Wonderful and easy to understand.
@dishajha8152 жыл бұрын
Brilliant explaination ,,, thanx a lot 😭
@harindudilipa15595 жыл бұрын
It would be even great if u answer peoples question in comments khan acadamy
@jamnachoudhary52433 жыл бұрын
your explanation is awesome ............ so,thanks sir😊😊
@bonexs3294 Жыл бұрын
Sir, please do course video on electronics and communication
@beautlin36525 жыл бұрын
I'm very lucky to see this video😍😍 But my friends don't 😈😈
@AfritopHappyFamily2 ай бұрын
Me too❤
@DisiCoco-nm2gw15 күн бұрын
😡 share😢😒😊
@thrupthishetty8965 жыл бұрын
Omy god his explanation is so awesome
@advaitagautam3505 Жыл бұрын
thank youuu 😄
@gayathribhat6323 Жыл бұрын
wow just wow
@freidarhealness52165 жыл бұрын
The transistor is probably the most genius invention in the history of human beings.
@DrAdityaReddy Жыл бұрын
The diode is. imo
@ganeshbodepu98453 жыл бұрын
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-13 жыл бұрын
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.
@manjumk05014 жыл бұрын
Simply wonderful.. Thank you soo much.
@phalgunarao58772 жыл бұрын
Great explanation sir.
@SamiAl-Amir2 ай бұрын
If the voltage is more than 0,7 why the electrons cant go through the deplition region. I dont understand why the transistor cant work with one battery
@ahmadeldesokey98445 жыл бұрын
Best video on transistors .♥♥
@ChayanGhosh-d2iАй бұрын
Boss thank uuuuuuuuuuuuu:)
@arunasolanki30345 жыл бұрын
It's really concept clearing.
@Shubham-rl7zw3 жыл бұрын
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
@dharmendrarathod37532 жыл бұрын
Love your channel sir. ❤ 👏 🙌 👌
@bhuvaneshwarisaravanan96823 жыл бұрын
Super explanation.....
@mdsakilbhuiya86894 жыл бұрын
You are really a great teacher
@snowboarder1pro2 жыл бұрын
Thanks
@amitkumarsaroj60712 жыл бұрын
Thank You so much sir 🥰🥰🥰🥰🥰 Really very well explained
@alishaanjum1108 Жыл бұрын
Why recombination is imp in p region for electrons to get pulled out from it
@bonexs3294 Жыл бұрын
please upload courses on electronics and communication please Sir
@abishangar8680 Жыл бұрын
4:30 => Only 0.7V is enough to break the depletion layer. But there is 2 depletion layers. So, 1.4V is enough to break it. Then Why electrons can't diffuse from N region to P region while 5V potential difference is connected?
@lakshitadixit5 Жыл бұрын
No only 0.7 V is enough because first depletion region is from N to P so 0.7 is enough for electrons(majority charges) to overcome the potential barrier. The second depletion region is from P to N where electrons are now a minority so the in built electric field in that region is in favour to accelerate those minority electrons from P to N
@lakshitadixit5 Жыл бұрын
The electrons can not diffuse from N to P region even with the 5 volt because N is negative type connected to a Positive+5V terminal so electrons instead of getting diffused to P will get pulled from that N by +5V as opposites attract.
@varunsingh83223 жыл бұрын
that was phenomenal
@ankitashah830610 ай бұрын
I have a doubt like why don't the barrier potential at each junctions get cancelled out as they would be acting opposite in direction
@jauhark77465 жыл бұрын
Now i know what transistor actually do....thanks dude😊
@markszlazak4 жыл бұрын
Will you add some lectures on JFET's and MOSFET's?
@vijaypanta97784 жыл бұрын
Masterpiece.
@roopas84624 жыл бұрын
how does electron get pulled out if it recombines. shoudnt it form covalent bond
@rigelmario2912 Жыл бұрын
Tnx mann
@lpokiiim2 ай бұрын
nice vid cheers
@OmarKhan-ds1si4 жыл бұрын
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@ricomajestic2 жыл бұрын
Depletion layer in base emitter junction is too large and 5V are not being applied to the base-emitter!
@sakshi6532 Жыл бұрын
Imagine getting like from this guy behind this legendary vedio
@zasharan25 жыл бұрын
Hold on, why can't you use a transformer to amplify the sound?
@KhanAcademyIndiaEnglish5 жыл бұрын
Beautiful question. You see our transistor voltage amplifier amplifies both voltage and current (by using external DC source - Vcc in our video example) But if you use a transformer, then if you step up voltage, current steps down and vice versa. Hope this clears the doubt? :)
@zasharan25 жыл бұрын
Ok, yes I see now. I didn’t think about that. Thank you for clearing it up!
@abirhasib23365 жыл бұрын
@@KhanAcademyIndiaEnglish The electrons that forwardly biased , entered the p type ...but in n type which is attached to the +5v there is a lots of electrons .then why these electrons didn't repel the forwardly biased electron?
@reetichauhan3554 жыл бұрын
Abir Hasib remember the current is continuously flowing. So (according to what I’ve understood) the no. of e entering from the N of FB to N of RB via P will be same as e exiting N of RB to the wire I.e towards speaker
@Hakase02114 жыл бұрын
@@abirhasib2336 It isn't negatively charged. It is just doped. it has electrons, but they're the regular amount. If it was negatively charged, it would cause a repulsion. At least that's what I think.
@copernicus6420 Жыл бұрын
Opacity is really important
@hirunrashentha10823 жыл бұрын
Great explaination 💪👌
@miyurusam4 жыл бұрын
Sir is it possible to make an overview video of electronics?
@akashrawat292274 жыл бұрын
Best explanation
@nitika9769 Жыл бұрын
Will this transistor mal function when all the wholes are recombined with in p region?
@dawitabebe8 ай бұрын
''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 ''