1:24, how can you say that electrons are entering from positive terminal, isn't supposed to enter from negative terminal to positive terminal, in order to match the conventional current?????
electrons flow opposite the conventional current. This confused me as well until I read this article: www.physicsclassroom.com/class/circuits/Lesson-2/Electric-Current
Because in the crystal structure they are donating their electron and if some species gives up electron it becomes positively charged.. Similarly in case of acceptor atom they are accepting electron from others and passing it holes or in other words it simply accepting electrons , hence we can say that it is negatively charged.. That's why we write the equation as .. Nd+ p= Na+n
100 electrons are moving from the other end...i think..because the battery is connected that way and not in the way you have explained. Please correct me if im wrong.
SIR u have started with taking both n and p type simultaneously for electrical neutrality but if we take only n type then is it electrically negatively charge ????
Jamal ansari No. There are more number of electrons in CONDUCTION BAND, however total number of electrons and PROTONS (not holes) in the material remain same. Material will loose neutrality only if number of protons and electrons are different.
sir, In the case of 1&2, i have known the number of doped atoms are small. so i can't understand how Nd=n-p(n>>p) .because Nd, Na are small numbers in each case, i think Differences between n&p will be small too .
Depends on doping In n type u have electron concentration much greater than holes concentration and as u doped the donor ions also increases when doped with pentavelant impurity
The lectures are extremely good and to the point.. There's one mistake here, we have positive donor ions and negative 'acceptor' ions.
p type are known are acceptor ions and n type are known as donor ions
no after doanting an electron the donor atom become positive remember this
Indians are the best in anything related to electronics
How can u say that?
chinese are way too ahead bro.
Well I'm not.
Well actually not because most of the crowd is going towards CS/IT in search of jobs.
@@dakshsingh8004 not for long
So u drew copper wire with reddish brown color.. u r really artistic aren't u 0:35
Thank you very much sir 👏
at 3:48 you said negative donor ions...!!!🤔🤔 these are negative acceptor ions right..???
yes
Very good lecture
1:24, how can you say that electrons are entering from positive terminal, isn't supposed to enter from negative terminal to positive terminal, in order to match the conventional current?????
electrons flow opposite the conventional current. This confused me as well until I read this article: www.physicsclassroom.com/class/circuits/Lesson-2/Electric-Current
Nicely explained. All doubts and concept are clear❤❤. Please keep uploading the videos
very helpful lecture
sr pls make lecture on special type diode like tunnel varactor pin schotky etc..
Thank you so much sir
Sir 4:58 , why donar atoms are positively charge
Because in the crystal structure they are donating their electron and if some species gives up electron it becomes positively charged..
Similarly in case of acceptor atom they are accepting electron from others and passing it holes or in other words it simply accepting electrons , hence we can say that it is negatively charged..
That's why we write the equation as ..
Nd+ p= Na+n
@@sk.jisanrahaman6444 these lectures are useful for gate?
Thanks
Why concentration of acceptor impurity in n type is zero ? In my book they are showing (Nd - Na) they haven't taken Na as Zero ??? But why ????
since donor impurities sre called as n type thats why acceptor impurities are taken as zero
superb sir
100 electrons are moving from the other end...i think..because the battery is connected that way and not in the way you have explained. Please correct me if im wrong.
Aren't Na and Nd electrically neutral? Na- and Nd+ only has charged i. e atoms are neutral and ions have charges?
So good video
sir, make the video of frequency response
what should i type to search to get the background music which is used in your each video ? i really like the music very much
How can Be donat atoms be positivly charged? they have extra electron and that's why semiconductor matirial becomes negative type...
vishal chavda they can lose these electrons easily...thats why they are marked positive
yaa,,,, thanks,,
Plzzz make videos on cmos
in mass action law how the genration term came???#Neso-Academy sir
Maybe
From observation while experimenting 😂
but you have said that mass action law is for intrinsic semiconductor . How can you apply it for n-type?
In instrinsic semiconductors p=n
The mass action law is useful for extrinsic semiconductors
Same doubt at present 🤜🤛
Have u found the answer..If u found pls post it in comment box
Sir if holes are presenet in an extrinsic semiconductor how can acceptor ions be zero.
Acceptor ions hav nothing to do in a n type semiconductor as the holes are the minority charge carriers in the n type semiconductors.
@@syedahamed7334 sir but why in text books we have the difference (Nd - Na) in the denominator of the formula for the n type ????
SIR u have started with taking both n and p type simultaneously for electrical neutrality but if we take only n type then is it electrically negatively charge ????
Jamal ansari No. There are more number of electrons in CONDUCTION BAND, however total number of electrons and PROTONS (not holes) in the material remain same. Material will loose neutrality only if number of protons and electrons are different.
Na should be positive change because it can accept electron so it should have positive charge, no? @neso_aceadmy
تشکر
Sometimes the screen blurs
Because your connection is slow.
change the quality of video from auto to the desired quality i.e. 360 is good
You are god father to me
sir, In the case of 1&2, i have known the number of doped atoms are small. so i can't understand how Nd=n-p(n>>p) .because Nd, Na are small numbers in each case, i think Differences between n&p will be small too .
They are small but n and p are themselves very small
They are small but n and p are themselves very small
Depends on doping
In n type u have electron concentration much greater than holes concentration and as u doped the donor ions also increases when doped with pentavelant impurity
Not so helpfull
Thank you so much sir 😊