Transistor working | Class 12 (India) | Physics | Khan Academy
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- čas přidán 17. 04. 2018
- 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.
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Created by Mahesh Shenoy
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
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
Dude NCERT is not mad. A book is never mad, every book is great and special in its own way
@@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.
@@teratrox4685 Ok clown🤡
@@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
No lecture can match urs not even the paid ones hats off💂
true
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.
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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 .
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I don't understand how the recombined electrons would give rise to base current..
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Now i know what transistor actually do....thanks dude😊
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बहुत ही अच्छा और अतुलनीय विवरण दिया गया है।
Best video on transistor on the internet 🎉
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Kindly explain more how an electron must go under recombination to be attracted from the base voltage?
perfect explanation with a nice example👏
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
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.
I was thinking the same thing thanks for the explanation.
that was phenomenal
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When peeps google Transistor they should be pointed here. Wonderful and easy to understand.
A lot of this has to do with proper polarization from external power sources to properly bias the devices
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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...♥️
Masterpiece.
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Will you add some lectures on JFET's and MOSFET's?
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Great explanation sir.
The video is great!! But why is it necessary for the electrons to undergo recombination in order to get pulled out?
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
@@OmarKhan-ds1si same doubt
@@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.
@@OmarKhan-ds1si there is no potential barrier bw the metallic plate and N so electrons can be pulled easily
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.
I can just say a huge huge thnx sr
Super explanation.....
istg bestest teacher ever on electronics
Well explained
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Sir is it possible to make an overview video of electronics?
Incredible explanation
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I finally got it!
very well said
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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
Good job 👏
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Finally I understood how a transistor works! Hats off😍
czcams.com/video/pqeb66xrkbE/video.htmlsi=BhPuTiSGQulM87F2
perfect
thank youuu 😄
how does electron get pulled out if it recombines. shoudnt it form covalent bond
Sir, please do course video on electronics and communication
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
We could add a resistor so that it doesn't exceed 5V.We could make the voltage drop
The transistor is probably the most genius invention in the history of human beings.
The diode is. imo
Best explanation
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Thank you :)
Will this transistor mal function when all the wholes are recombined with in p region?
Can you please make a video about thyristor?
Why recombination is imp in p region for electrons to get pulled out from it
''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 ''
You are really a great teacher
Thanks
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Excellent video
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
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?
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.
When 5V are applied to pull electrons then why we need forward biasing volatge of 0.7V at base ?
Depletion layer in base emitter junction is too large and 5V are not being applied to the base-emitter!
recombined electrons become neutral, how they can be pulled out left side? anyone please