I don't know how to thank u for these awesome lectures... I m desperately searching channel like u for other subjects.. really thanks a lot... u really helped me when I really needed..
At 7:00 it's said that we compare j=sigma×E and sigma=(n×myun + p×myup) to get conductivity ..but in the last after deriving the equation sigma =[n×myun+p×myup]e it is said that it is the equation used to find mobility.. So my doubt is ...is the last equation used to mobility or conductivity Edit. okk got it it's for conductivity
please tell me that at 5:44 how can you say that the effective mass of hole > effective mass of electron? whereas there is another phenomenon of higher conductivity, please elaborate anyone.
can anyone explain me? charge of electron is -1.6*10^-19c right? and hole is 1.6*10^-19c. how we can take charge as common in equation? we should apply electron and hole charge in problem right?
Intrinsic semiconductor is pure semiconductor.Wereas extrinsic semiconductor has better conductivity(compared to intrinsic) but its conductivity is less compared to as of Conductors.
@@fazenubb1899 thats why we call it effective mass, not just mass. To move a hole from one place to another, you have to move one electron to its place, and to do that you need force. You can then see how much time it took to get the hole to that place. So hypothetically, you can calculate a mass, even though they are not physical things
I don't know how to thank u for these awesome lectures...
I m desperately searching channel like u for other subjects..
really thanks a lot...
u really helped me when I really needed..
Neso is the best guide for studying these topics. Always provides a deep explanation of topics in a beautifully structured way.
Neso Academy has the best Quality educational content , across youtube , as far i have seen .
Thank you so much.
your lectures are too good and lucid....please upload more for analog electronics..like feedback systems power electronics etc..
after watching more then 30 videos now i can say that you are great sir
Is it important for boards
your lectures helped me lot.please upload some more new lectures on semiconductors.
thank u very much.
The best video in the field, thank you!!
plz upload circuit and system lecture if u can i beg u plz upload and your digital lectures were really helpful it really helped me a lot
Very use full...loved your site
Best explanation ever 🙏🙏❤️❤️❤️❤️🫶
Thank you gurudev❤❤❤🙏🙏🙏🙏☺️. You are doing great work.
Love the intro music.
At 3:00, n is the number density or number of charge carriers per cubic metre. So that makes 'ne' charge per cubic metre.
Number of charge carriers
@@abhaysaxena9410 n should represent the number density/number of charges per cubic metre
Amazing videos , clears all concepts ,enjoying studying with NESO academy!
At 7:00 it's said that we compare j=sigma×E and sigma=(n×myun + p×myup) to get conductivity ..but in the last after deriving the equation sigma =[n×myun+p×myup]e it is said that it is the equation used to find mobility..
So my doubt is ...is the last equation used to mobility or conductivity
Edit. okk got it it's for conductivity
please tell me that at 5:44 how can you say that the effective mass of hole > effective mass of electron? whereas there is another phenomenon of higher conductivity, please elaborate anyone.
As velocity of hole is much lesser compared to electrons, we consider this effect and map it to their masses
thank you sir you are a great help
Conductivity? More like "Cool lectures for you and me!" 👍
Thank you very much sir 👏
Thank you sir
hats off from EEE
Holes will move in the direction of E applied sir ji
Thank u sir
Y cut the audio at 5:50. Wat is sigma
Sir why n=p=ni? instead n=p=√ni?
n=p=ni and n*p=√ni
What about the conductivity in doped semiconductor , is the equation will still be valid , as p and n is not equal in case of doped s.c
can anyone explain me?
charge of electron is -1.6*10^-19c right? and hole is 1.6*10^-19c. how we can take charge as common in equation? we should apply electron and hole charge in problem right?
6:47 don't you mean conductivity ?
What is the difference between a conductor and intrinsic semi conductor? Can a conductor be extrinsic?
I think,the basic difference lies in the "number of free electrons available at room temperature"..
Intrinsic semiconductor is pure semiconductor.Wereas extrinsic semiconductor has better conductivity(compared to intrinsic) but its conductivity is less compared to as of Conductors.
How eff. Mass of a hole is greater than that of an electron? As hole is nothing but absence of electron in the lattice.
Sir how could a hole possess mass if it is vacant??
That's my doubt too
@@fazenubb1899 thats why we call it effective mass, not just mass. To move a hole from one place to another, you have to move one electron to its place, and to do that you need force. You can then see how much time it took to get the hole to that place. So hypothetically, you can calculate a mass, even though they are not physical things
I get sleep after these classes don't know y
tq
How do holes have mass?
a hole is a model for a proton
Sir in n=p=ni p refers what
Sorry sir i understand now
How can I flow u
very confusing video
so much notation , could it be simpler