PHY-XII-14-03-Intrinsic & Extrinsic S.C.(2016)Pradeep Kshetrapal Physics channel

[@sandeepbharti1006]

sir, your work is teaching and you're doing well and I wish if the teacher like you will teach in this way ,most of our Indian students will know clearly and they'll learn many more. English language is good but it doesn't mean we totally forget our hindi language. perhaps you don't know sir cuz many students weather poor or rich who wish to achieve their goal but they failed. And the teacher like you internally motivate to study. a great salute to you sir Keep rising sir

[@shikhavats8920]

Sir aapke subscriber hamesha hi badheinge kyonki generation badhti rahegi 12th aati rahegi u did greatest job. Ur lecture are pure .

[@liankyson9161]

you prolly dont give a shit but does any of you know of a way to log back into an Instagram account? I somehow forgot the account password. I appreciate any tricks you can offer me.

[@incredibleankit694]

Sir aapke is pink duster ka bhi bhot role hai hmlog ka concept clear krne me...bechara bhot topic pe example ka kam kiya hai...thanku duster.

[@dakshsharma5258]

Agree

[@amanansari9581]

Ha ha😂😂

[@RiyaSharma-se5fd]

Hehehe😂

[@prateekarora4549]

ur students sir are very disciplined. The way u teach is very good.THANK U SIR ;-))))))))))))))))))

[@pushkarsoni8927]

sir please do some live sessions where we can ask you questions. that will be very nice. pls pls pls.. students who agree with me like this comment.

[@puneetkaurnagpal1196]

sir there is option of facebook live..a live session will be of great help

[@AnmolSharma-ts4jy]

Pushkar Soni c

[@vidyachaudhari2549]

Thnx sir...u r the great

[@jagritbudhiraja6391]

There is an option of KZbin Live. You can do it by that. Just tell us the time when you will go live and we will be ready

[@khansaddiquektk7915]

All Pakistani is agree to your decision

[@Amansingh-yf6si]

Sir ab asap is dunia me my nhi rahe .... Lekin aapki yaade hamesa hamesa ke liye zinda rahengi .... Apse accha insaan maine is dunia me abhi tak koi nahi dekha ...... Aah you tube par bhot saare teacher live aakar smartboard par padhate hai crash course nikalte hain ....lekin vo aapke jaisa nhi ban sakte

[@samrasajjad1082]

You are a great teacher of Physics.I really appreciate your work.May God bless you always.I feel blessed that I found your channel on youtube.Sir please upload videos for last chapters also.I shall be very thankful for your this act of kindness.Stay blessed.

[@cuteecuteee9987]

U are the best teacher in the world

[@harshneetkaur4012]

I wish I Have time machine to go back into 11 class. So that I also secured best marks. But sir at that I even cross 12 class. 😢 😢 😢 😢 😢 😢 My all friends knew it from starting But none of them tell me. MORAL is all friends are selfish.

[@harshneetkaur4012]

I also used to scolded by my parents because of my marks as they compare me to those who were watching your videos.

[@harshneetkaur4012]

At this time I wanted to slap my all friends

[@kgnstarinterior2118]

@@harshneetkaur4012 its ok everything is happens for a reason keep smiling and enjoy your life instead wasting of time in this kind of thoughts

[@sabiasethi6127]

@@harshneetkaur4012 how much have you scored?

[@Amansingh-yf6si]

It's okay .... You can gain knowledge from this channel now By doing this ..... You will become a better student of physics no matter you have this subject not now...... It will be a better revenge from your Freinds instead of slapping them......and also marks cannot decide the potential of any person ☺☺☺

[@jaypatel7632]

Very good

[@anjaliverma-bg5in]

great explanation sir.....u r the best one.....

[@ShettyAnna10]

sir would u plz upload a video on BIPRISM EXPERIMENT? i m finding it tough?

[@rashi2937]

Without u...I cant imagine the world of PHYSICS ❣❣❣❣ Thanks sir

[@abd2180]

Hlo

[@rashi2937]

@@abd2180 yeh..hello

[@Amansingh-yf6si]

Cooker me se channe nikaal diye aur khali cooker gas par Chadha diya

[@sandhyakumari9437]

Thank..... a lot.... your videos are very veryyyyyy.... helpful....

[@avinashdubey1806]

Sir you are so much helper of poor student

[@sindhurhegde123]

as usual great explanation

[@aditisharma2742]

sir in sl arora its mentioned that mass of holes = mass of the electron removed but u stated that mass of hole is much greater than the electron . pls correct me if i m wrong coz its very confusing and is hole and positively charged atom same thing or is it just the vacant space created in atom due to vacancy of electrons .....?

[@upscphysicscorridor4834]

sir we can't achieve 0k temp how we take 0k for energy diagram

[@ankitsiruvani7547]

Thank u so much Sir I hope u keep helping us by free videos

[@harshneetkaur4012]

Awardable work

[@aishwaryaviraktamath6374]

for me greatest the greater job

[@ghulamsabir4795]

why we not use other than pentavalent impurities to make n type materials?? Because there exists such materials which can increase the number of free electrons in semiconductor, which will make it n type material!!!! But yet we use pentavalent?????? plz ans

[@harshvegad4480]

A very catchy video! i appreciate it! thank you sir.

[@brabeemsapkota5791]

Sir mera aur bhi ek sabal hai ki yeh jo apne electron ko hole me dalne ki baad positive charge phir develop kiye yeh conservation of charge kaise follow karta hai ?? jab pehele total charge 0 kyeu ki hole ka aur electron ka charge equal hota hai phir baad meh toh wo positive charge jyada aagaya na toh conservation principle kaise follow hua????

[@169ramandeepkaur6]

sir aap ne kaha hai k in intrinsic semiconductors both holes and electrons will constitute current and ni as number of instrinsic charge carriers so yeh aap ne likha hai Ne=Nh =Ni .....means aaisa kyu nhi likha Ne +Nh = Ni .....i just want to say that charge carriers ka sum kyu nhi kiya?????

[@amiya032010]

Ramandeep kaur :The no. of electrons in conduction band or the no. of holes in valence band is called intrinsic charge carriers. Sir has explained correct.

[@brabeemsapkota5791]

Metals meh bhi to yesa hi hona chayiya na kyu ki uha par bhi some electrons of valence band conduction band meh ja teh he aur hole aur electron dono ho hai to uha par current electron ki ojhe se hi kyu liya jata he??

[@divispradye]

The current due to holes, how did you put +ve in the bottom atom? The atom on top of that is losing electrons. That should be +ve right?

[@tricktechrealitycheck1431]

Sir in second limitation of intrinsic semicoductor i think the no of electrons are dominant to thermal relaxation time period so current will increase as temperature increase.( i am right sir or not )

[@roshnirai9578]

Thank you sir for uploading videos. it really help me...

[@hesoyamhesoyam8619]

sir if we increase temperature no of free electron ie no of electron in conduction band will increase hence current should increase when temperature is increased

[@wanderingtowholesome]

The conductors behave differently from semiconductors.For the semiconductor, the conductivity increase with the temperature because when the temperature rises it leave the valance band and goes in the conduction band,On the other hand, the conductivity of metal decrease with increase in temperature because, when the temperature increases the electrons start oscillating in their mean position and collide with free moving electron which leads to increase in resistivity.

[@kgnstarinterior2118]

@@wanderingtowholesome amazing bro

[@anandsrivastava7115]

Sir Electron always attracts by positive charge If in some cases hole have no positive charge then how it attract

[@RiyaSharma-se5fd]

I am a big pw fan but here cause he is not making videos anymore! ... Nevertheless I understood every single thing... Thnx a lot sir ... Luckily I found ur video at right time ! ❤️... Dhnyvaad 🙏

[@vipinsarkate7694]

Sir I want to join your coaching how can I do so please let me know as soon as possible thank you sir.

[@kgnstarinterior2118]

why you want to join the class often sir has uploaded all the video

[@playingstore5183]

You are more than teacher

[@dikshantsharma3038]

Like

[@kgnstarinterior2118]

amazing outstanding fabulous

[@MamtaYadav-yb9wl]

Sir u said that when we increase the temperature current decrease in semiconductor bt how it is possible

[@shahjee9188]

You this process occurs in conductors

[@thanoskumar5107]

Always awesome.

[@dinshabhatia2570]

Q.8 A sample of germanium is doped to the extent of 10 14 donor atoms per cm3 and 7 × 10 13 acceptor atoms per cm 3. The resistivity of pure germanises at the temperature of the sample is 60 Ω cm. Find the total conduction current density due to an applied electric field of 2 V cm -1. The electron and hole mobilities are given to be 3800 cm 2 V -1 S -1 and 1800 cm2 V -1 S -1, respectively. (Ans. 52.3 mA cm -2) sir plz plzz solve this

[@lopamudrapattanayak6847]

Sir, can you provide the notes, please

[@divyapatle2572]

Thank you so much

[@madanjalandhar4059]

god of physics

[@saurabhdevakar8334]

sir why u are providing these first rather than nuclei and dual nature?could we knw reason bhnd ths?and until when our syllabus will complete?

[@vinitasrivastava6254]

Vry nyc explanation thanks sir

[@AJEETSINGH-bq2zm]

Very very Thank u sir.

[@zs4751]

Legend

[@abhishekshaweducation2041]

Intrinsic semiconductor Mein hole current flow karta Hai to conductor mein v to hole form ho sakta hai

[@kgnstarinterior2118]

yes it can be

[@injourney7147]

thank u sir😊

[@manishagrawal902]

hello, are these lectures enough for 2018-19 batches also becz 2016 is written over there?

[@injourney7147]

@@manishagrawal902 concept never gets old , i am glad to have these lectures , rest its up to u .

[@Live-like-a-king-mann]

Complete

[@sapnarahim9311]

Great te6r ever

[@jaspreetbains7129]

sir aapke board baut ache hai

[@mubasharnawaz651]

Good

[@nitinyadav3572]

Thankyou sir

[@maahi1768]

👍

[@fareedraza1540]

Hi Maahi

[@DEFENDER1932]

🙏🙏

[@rachnajain9404]

🙏🏻👍🏻

[@saltygamer5992]

Good morning sir.

[@nothinghereyet1803]

BitNic SHUT UR MOUTH. ...😆😆😆😅😅😆😅😆😂😁😀☺😂😃

[@Rajveerpratapsingh3755]

Sir problem at 38:26

[@dikshantsharma3038]

@@PradeepKshetrapal sir neglect these comments

[@amitgaur5710]

Only og know sir

[@harshneetkaur4012]

U r the big reason for increasing competition 😥😌

[@jaspreetbains7129]

koi baat nhi y

[@jaspreetbains7129]

🙁🙁 himaat mat hato

[@asadyaseen3429]

Why do we take temperature in kelvin but not in Celsius and Fahrenheit??? In the study of behavior of semiconductor at various temperature s.

[@sonusingh-dw7ch]

@@asadyaseen3429 kelvin scale scientific scale thats why it is used most

[@dikshantsharma3038]

@@asadyaseen3429 S I unit

[@devilbaby8034]

J sa superman up ha mera physic man

[@simpisharma4798]

Thanks sir

[@ihrazjalil7875]

Sir...i m pakistani......bt i m ur dangerous fan

[@aishwaryaviraktamath6374]

for me greatest the greater job