Photoelectric Effect - Modern Physics (Part-2) | Revision Checklist 48 for JEE & NEET Physics

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  • เผยแพร่เมื่อ 18 ธ.ค. 2024

ความคิดเห็น • 477

  • @faxilbhattgmck6643
    @faxilbhattgmck6643 4 ปีที่แล้ว +409

    Physics galaxy has maintained its trust among students for its quality education ...no TH-cam channel can be compared with physics galaxy ...luv u sirr

    • @shriniwashshrma4964
      @shriniwashshrma4964 4 ปีที่แล้ว +48

      Bhai compare to hume karna bhi nahi chahiye but ek channel hai jo ki mujhe iss channel jitna hi accha lagta hai mohit tyagi sir ka channel

    • @jayashree5000
      @jayashree5000 4 ปีที่แล้ว +19

      @@shriniwashshrma4964 wo maths ke liye bhai... For physics pg is definitely the best and for maths it's Mohit Tyagi sir without a doubt

    • @jaykoey3683
      @jaykoey3683 2 ปีที่แล้ว +2

      @@jayashree5000 abj sir aur arora sir

    • @calculus3097
      @calculus3097 2 ปีที่แล้ว

      Definitely yesss ... heaven for me

    • @ankushsingh0710
      @ankushsingh0710 ปีที่แล้ว +8

      The reason why i have subscribed to PG and not to PW.....

  • @ayaanshakil1135
    @ayaanshakil1135 4 ปีที่แล้ว +483

    No one literally no one :-
    Le Ashish sir
    after every 2 min :-- THANKU POGEE

  • @sense_storiess
    @sense_storiess ปีที่แล้ว +54

    TIME STAMPS
    1. Electron emission processes 1:05
    2. Threshold frequency & Threshold wavelength 10:13
    3. Behaviour of photon energy for PEE 12:35
    4. Quantum efficiency of metal surface 17:10
    5. Effect of intensity variation in PEE 21:00
    6. Effect of temp on PEE 23:25
    7. Time lag 25:50
    8. Experimental study of PEE 28:00
    9. Stopping potential 38:20
    Hope this helps,
    Best wishes :)

  • @tarunpareek02
    @tarunpareek02 ปีที่แล้ว +13

    agar bhagwan mujhe bolenge ki kya vardan chahte ho toh me ashish sir ka pogy banuga kitna khush h yaar vo aata h or clear krke chala jata h or toh or kewal jarurat padti h toh draw krke bhi jata h Gratitude for pogy😀

  • @arunmohanty92
    @arunmohanty92 4 ปีที่แล้ว +533

    This is called real teaching but sad reality students always run after the teachers who gives a scope of entertainment and nonsense talking...
    Now i am working as a faculty in physics i learned a lot from sir🙏🙏❤❤

    • @rajatverma3112
      @rajatverma3112 4 ปีที่แล้ว +12

      Yes you are right.

    • @sushilpanda5980
      @sushilpanda5980 4 ปีที่แล้ว +5

      @@rajatverma3112 you are from odisha?

    • @babayoga8206
      @babayoga8206 4 ปีที่แล้ว +62

      ALAKH PANDEY sir BHI entertainment dete h par I won't say it's non sense

    • @rohitraaj7559
      @rohitraaj7559 4 ปีที่แล้ว +15

      @@babayoga8206 it's again a best teacher of physics and chemistry...

    • @VinayKumar-ye5qq
      @VinayKumar-ye5qq 4 ปีที่แล้ว +3

      Right sir..

  • @targetneet2131
    @targetneet2131 3 ปีที่แล้ว +96

    40:35 it should be h/e
    Great lecture I completed the topic with it. Not only Revision it's a complete pack of every concept.

    • @Sudip_Sardar
      @Sudip_Sardar 3 ปีที่แล้ว +7

      Thanks

    • @ayushsrivastava9298
      @ayushsrivastava9298 2 ปีที่แล้ว +1

      Exactly

    • @kamalreddy-c4m
      @kamalreddy-c4m หลายเดือนก่อน

      came back to this lecture after a mock test today- I lost 5 marks cuz I wrote it as h/v in my notes....while analyzing, wrote down the equation again and checked that the slope is actually h/e- yep sir made a mistake here- I should've double-checked while making notes itself lol

  • @krishpatel432
    @krishpatel432 4 ปีที่แล้ว +48

    Highly appreciable teaching......! Best video playlist to revise physics

  • @Anonymous-erdev
    @Anonymous-erdev 10 หลายเดือนก่อน +3

    5:21 e emission, i) Thermonic
    10:08 ii) Photoelectric, iii) Field iv) 2ry
    12:28 Threshold freq n wavelength
    17:00 Behaviour of photon erg in PEE
    20:52 Quantum eff. in PEE
    23:20 Eff. of I and freq. in PEE
    27:53 Eff of Temp and Time lag in PEE
    34:51 Exp study of PEE
    38:00 "
    42:00 Stopping Potential in PEE

  • @aryanshrivastav4850
    @aryanshrivastav4850 4 ปีที่แล้ว +181

    At 40:49 the slope should be h/e but overall lecture was awesome

  • @Dominator_IND_001
    @Dominator_IND_001 2 ปีที่แล้ว +23

    It is quite different feeling really, after seeing a title "revision" by Ashish sir but in that shade im dealing with topics that my faculty had never even spoked about. Thank you sir for covering my unseen topics. Gr8 knowledge ♥️♥️

  • @tpsicmin
    @tpsicmin 3 ปีที่แล้ว +15

    In my opinion There is No other TH-cam channel for Physics which is as useful as PHYSICS GALAXY
    Ashish Sir is BOON for Us
    Thanks SIr
    Thanks To All PG Team

  • @harshitsahu845
    @harshitsahu845 3 ปีที่แล้ว +21

    GOD of physics &this checklist is really helpful

  • @codingshorts4731
    @codingshorts4731 4 ปีที่แล้ว +40

    22:15 real physics application...lol no smart board but pogee rocks

  • @ujjawalkr.234
    @ujjawalkr.234 3 ปีที่แล้ว +18

    This level of content in such a small time.. Can't gave anyone.
    He explained everything related to pee. Thanks

  • @ajayjakhar.9851
    @ajayjakhar.9851 4 ปีที่แล้ว +37

    Your lectures gives best value when viewed in 1.5X. Really saying sir

  • @joyjit.debnath
    @joyjit.debnath หลายเดือนก่อน +2

    Sir in 40:35,
    tan theta will be h/e
    Comparing with y=mx+c

  • @thefreakguy3957
    @thefreakguy3957 4 ปีที่แล้ว +278

    Pogi is rocking every lecture 😂

  • @vandanashukla7394
    @vandanashukla7394 4 ปีที่แล้ว +8

    watched your videos for the first time and just got hooked watching various series provided for iit jee
    amazed watching the video
    each and every concept is covered in a short duration (I did not expect that really)
    i have already studied this chapter in coaching and wanted video that covers all concept and structurise,
    but did not thought that it will be so easily available for free on youtube
    today i got what i really needed
    the whole checklist playlist is awesome
    thank you so much sir for this big and selfless help

  • @YBwaibeeYB
    @YBwaibeeYB 4 ปีที่แล้ว +85

    Love these videos sir! Thank you so much!

  • @futureiitian-viveksir9652
    @futureiitian-viveksir9652 4 ปีที่แล้ว +8

    My Students Learn physics from your video. Thanks a lot sir

  • @maheshbora5058
    @maheshbora5058 3 ปีที่แล้ว +9

    This checklist helps me to gain confidence in Physics!

  • @krishnamurthygonella611
    @krishnamurthygonella611 4 ปีที่แล้ว +20

    Sir excellent explanation

  • @_Anmol-oh4iu
    @_Anmol-oh4iu 3 ปีที่แล้ว +4

    this revisison checklist are 100% pure diamond ..BESt to recall all things at once

  • @samcurious
    @samcurious 2 ปีที่แล้ว +5

    At 40:49 par slope should be h/e not h/v

  • @sahilrohilla8856
    @sahilrohilla8856 4 ปีที่แล้ว +19

    Sir your videos are just amazing🙏🏻👏🏻 Thank you very much for your help💓

  • @NormieRajmaChawal
    @NormieRajmaChawal หลายเดือนก่อน +2

    If u guys dont know,Pogi is now in his 3rd year ( CS, IITb)

  • @sahilrana6664
    @sahilrana6664 หลายเดือนก่อน +2

    Thank you sir ❤ completed👍

  • @dilkashkhan5181
    @dilkashkhan5181 4 ปีที่แล้ว +9

    Thank you so much sir you are great.🙏🙏🙏

  • @nishantbajaj3208
    @nishantbajaj3208 3 ปีที่แล้ว +1

    At 40:35 tanθ=h/e.. But the lecture super duper awesome.....
    Got to know for first time that there are four types of emissions in physics.......

  • @ketansingh2159
    @ketansingh2159 4 ปีที่แล้ว

    Abhi tak sir maine modern phyics nhi padte the par ab full confidence hai! Apne bahut shaandar samjhaya! 🙏

  • @sambriddhineupane1982
    @sambriddhineupane1982 3 ปีที่แล้ว +2

    God of physics. Huge respect to you sir 🙏👏thank you for your efforts

  • @RamSangal
    @RamSangal 2 ปีที่แล้ว

    I am using physics galaxy books and i am having a good experience
    Theory is in detail and conceptual question are increasing our thinking ability

  • @voiceofindia4486
    @voiceofindia4486 4 ปีที่แล้ว +4

    As always awesome teaching. Thank you sir.

  • @vanshitavijay4877
    @vanshitavijay4877 4 ปีที่แล้ว +3

    Thanks a million sir for your efforts so that we can have quick review of all the concepts from basics to advance..🙏

  • @Dr.dhumketuIITDholakpur
    @Dr.dhumketuIITDholakpur 2 ปีที่แล้ว +2

    Siddhe baat no bakwaas no entertainment with gaurntee ki ye exam mai aayega one and only physics galaxy

  • @kiritkaravdara8207
    @kiritkaravdara8207 4 ปีที่แล้ว +1

    Honestly, 😊you are the best physics teacher ever!!

  • @raghvendratripathi1920
    @raghvendratripathi1920 4 ปีที่แล้ว +4

    You are the best...thankyou sir🙏👍

  • @pariboling8012
    @pariboling8012 ปีที่แล้ว +1

    Modern physics d1-✅
    Thankyou sir❤

  • @revaghadge1235
    @revaghadge1235 4 ปีที่แล้ว +1

    Thankyou sooo much sir
    This video has helped a lot to revise the entire topic without missing even a single point

  • @KBRohanKumarJha
    @KBRohanKumarJha 3 ปีที่แล้ว +2

    Brilliant explanation sir
    Thank You So much

  • @sachinsahu6799
    @sachinsahu6799 4 ปีที่แล้ว +2

    Thanks sir for providing us these checklist . These are very helpful.

  • @smrutiranjan9618
    @smrutiranjan9618 4 ปีที่แล้ว +4

    Sir pls upload next video soon. Eagerly waiting for you

  • @santoshsingh5453
    @santoshsingh5453 4 ปีที่แล้ว +5

    Bhagwan aapke jaisa teacher aur kiss ko na de
    I don't want ki competition bdhe
    Thank you sir😯

  • @rayavarapuphanikumar331
    @rayavarapuphanikumar331 2 ปีที่แล้ว +1

    It's very much helpful sir ... God bless u sir with a good health...

  • @aanchalsingh2836
    @aanchalsingh2836 2 ปีที่แล้ว +2

    Today I was Soo frusteted that how I revise jabki mein is topic ko 3 4 BAAr padh chuki hu aur finally when I see this lature I feel Soo confidence 👍👍👍💯💯💯💥💥💥💥

  • @AaradhyaPathak3
    @AaradhyaPathak3 3 ปีที่แล้ว +4

    Decent editing ,umm, I like that .

  • @20_SinManya
    @20_SinManya 4 ปีที่แล้ว +3

    Thank you so much Ashish sir!!!
    All of your videos are tremendously helpful!✨

  • @masudrajvi873
    @masudrajvi873 4 ปีที่แล้ว +4

    🔥🔥👍👍 love from Bengal sir❤️❤️❤️

  • @mahendar1113
    @mahendar1113 4 ปีที่แล้ว +5

    Sir..When will the modern physics part 3 be uploaded?.... You're an awesome teacher..I never thought revision can be this much is easy....

  • @ashish-hm4ey
    @ashish-hm4ey 3 ปีที่แล้ว +1

    Finally photoelectric concepts are revise now nest ..

  • @piyushshukla0601
    @piyushshukla0601 ปีที่แล้ว +1

    28:15 Albert Einstein do not performed this experiment.... He only explained the experiment that why it is happening and becaise of their explanation he got nobel prize 🎉🎉

  • @Saifali-vo8fv
    @Saifali-vo8fv 4 ปีที่แล้ว +10

    Sir last graph ma stopping potential and frequency ka graph ka slope I.e.
    tan (theta) =h/e
    na hoga sir...??

  • @sense_storiess
    @sense_storiess ปีที่แล้ว +1

    Apart from content the video quality is also dope ❤️

  • @miscellaneous937
    @miscellaneous937 3 ปีที่แล้ว +1

    Absolutely excellent , every other doubts got cleared

  • @jaishreeram5808
    @jaishreeram5808 2 ปีที่แล้ว

    Thanku so much sir...jb aap bolte h ki in points se aap exam ke sare question handle kr loge. .to confidence high ho jata h .❤️❤️❤️❤️😍❤️❤️❤️😍

  • @devendrakhachane1759
    @devendrakhachane1759 3 ปีที่แล้ว

    Best channel of physics on youtube

  • @pratiktiwari227
    @pratiktiwari227 2 ปีที่แล้ว +1

    Yes sir it's booster for jee aspirants

  • @anushkaSharma-qu4fn
    @anushkaSharma-qu4fn 2 ปีที่แล้ว

    @33:07 Why pinch off voltage increase with increase in intensity of incident light? I think pinch off voltage depends only on kinetic energy of electrons(less kinetic energy implies more work done implies more pinch off voltage) and not on the number of photoelectrons possessing that kinetic energy(as it will increase kinetic energy of all irrespective of number)

    • @user-fd6gx2kz8u
      @user-fd6gx2kz8u 2 ปีที่แล้ว

      We see that after sometime number of electron incoming on cathode stopped making the current constant in the circuit and not further increase. so we can say that pinch off voltage is fn of intensity

  • @thippareddy6609
    @thippareddy6609 4 ปีที่แล้ว +11

    sir one thing u did not cover that pressure and force experienced by cathode

  • @antrikshkhandegar6934
    @antrikshkhandegar6934 4 ปีที่แล้ว +1

    the best a JEE aspirant can ever get

  • @sumitdebnath4311
    @sumitdebnath4311 4 ปีที่แล้ว +2

    Thanku very much sir 🙏🏻❣️❤️💟 These checklist are boon to us . I am JEE 2020 aspirant thanks for ur efforts . Exam phod denge✊

  • @Rohan-nl5eo
    @Rohan-nl5eo 4 ปีที่แล้ว +26

    Sir I am following your Physics Galaxy 2e series. Sir if i will solve all the solved examples of all the 5 books of PG 2e series and all advance illustration 2 times by the method of CAPS-1. Is it sufficient to get good marks in JEE 2021 physics, if i will start from today. Please reply me sir i have only 5 months and i am starting from start Ch-1 kinematics.

    • @rohanbinjola632
      @rohanbinjola632 4 ปีที่แล้ว +8

      More than enough..

    • @devroopsaha4020
      @devroopsaha4020 4 ปีที่แล้ว +4

      Yess but plz don't forget to practice previous years questions.??

    • @kingway1872
      @kingway1872 4 ปีที่แล้ว +1

      It will ensure full mark in jee main

    • @lakshyagupta4211
      @lakshyagupta4211 4 ปีที่แล้ว

      Sir full concept videos kaha milengey

    • @l052_jeeveshpathak8
      @l052_jeeveshpathak8 4 ปีที่แล้ว +4

      @@lakshyagupta4211 ya to physics galaxy website par dekh lo....
      ya to physics galaxy youtube channel par playlist me mil jaengi...

  • @tusharikash.6878
    @tusharikash.6878 4 ปีที่แล้ว +2

    THANKS A LOT SIR.
    LOVED YOUR TEACHING ❤️

  • @badrilakkuru9098
    @badrilakkuru9098 4 ปีที่แล้ว

    Super teaching sir
    I understood very well
    Your checklist concept is amazing

  • @ghanshyamsundar4841
    @ghanshyamsundar4841 3 ปีที่แล้ว +1

    This session is really helpful for me
    Thanks sir 😍😍😍🙏🙏🙏

  • @ApexClasses4JEE
    @ApexClasses4JEE ปีที่แล้ว +3

    at 40:36 tan thita h/e hoga

  • @piyushdhok3622
    @piyushdhok3622 4 ปีที่แล้ว

    Real teaching ... thanks a lot sirji

  • @itsfaraz-here
    @itsfaraz-here 2 หลายเดือนก่อน +1

    Checklist 48 completed

  • @mikkelismichael8611
    @mikkelismichael8611 4 ปีที่แล้ว +5

    41:31 error in slope it should be h/e

  • @prachijha5826
    @prachijha5826 3 ปีที่แล้ว +5

    there is race between we and poggi
    sir says" poggi plzz clear karo"
    and we say "poggi likhne toh do yarr"
    poggi be like" rok sako toh rok lo"

    • @MrAlpha-gn7qg
      @MrAlpha-gn7qg 3 ปีที่แล้ว +1

      Dude can u tell that... are all concepts of modern physics covered in these lectures of pg? Are these good & enough for neet 2021? Kindly review dude... (For Modern physics only)

    • @prachijha5826
      @prachijha5826 3 ปีที่แล้ว

      @@MrAlpha-gn7qg yes

    • @tanmaysinha7002
      @tanmaysinha7002 2 ปีที่แล้ว

      @@MrAlpha-gn7qg more than enough for neet

  • @prathameshgadekar5836
    @prathameshgadekar5836 4 ปีที่แล้ว +1

    At 40:36 tan(theta) should be h/e not h/v

  • @109sakshin9
    @109sakshin9 4 ปีที่แล้ว +3

    Thank you so much sir 😊 😊

  • @s.p.k.prajapati8317
    @s.p.k.prajapati8317 4 ปีที่แล้ว +22

    Sir, thank you so much for excellent explanation.🙏🙏
    Sir, please explain the working of poji.😂😂

  • @IM-eg9xe
    @IM-eg9xe 4 ปีที่แล้ว +1

    Sir is associated with a top coaching institute but still he is offering such a content with all students belonging to or not to the coaching on the other hand there are some teachers with fabulous teaching style but the maintain their content exclusively to those Students who are paying huge amounts to the coaching institutes and now on some online coaching platforms!!
    #NVSir

  • @dharampatel1181
    @dharampatel1181 4 ปีที่แล้ว +10

    Sir is Kohinoor of physics

  • @aayushjoshi3681
    @aayushjoshi3681 3 ปีที่แล้ว +12

    27:19 Life to me nowadays.

  • @LimitPhysics
    @LimitPhysics ปีที่แล้ว

    Sir Revision without your video can’t imagine 🙏

  • @pandey2744
    @pandey2744 2 ปีที่แล้ว +2

    You are uncompetable 😊🥰♥️

  • @priyadarshsingh9791
    @priyadarshsingh9791 3 ปีที่แล้ว +8

    Is there any such playlist where sir has been solving pyqs???
    Plzz reply....🙏🙏🙏🙏🙏

    • @vinodf572
      @vinodf572 3 ปีที่แล้ว +2

      Yeah but not in this channel go to end game channel there is playlist of pyq

    • @kashishgupta1171
      @kashishgupta1171 2 ปีที่แล้ว

      @@vinodf572 any other channel for pyq ?

    • @ClarkKentfromKansas
      @ClarkKentfromKansas 2 ปีที่แล้ว

      Yes, he solves previous year papers as a whole, not subject wise. You can search Physics Galaxy PYQ

  • @Errorless_Pandit
    @Errorless_Pandit 4 ปีที่แล้ว +4

    Thanks a lot sir.

  • @arundhatijoshi8384
    @arundhatijoshi8384 4 ปีที่แล้ว +2

    Thank you so much sir! ❤

  • @constant.learner.123
    @constant.learner.123 4 ปีที่แล้ว +3

    How could one be so perfect... Love youu sirrr soo much❤️... I respect you very much from my ❤️

  • @crackjee5977
    @crackjee5977 4 ปีที่แล้ว +13

    Sir will there be a similar checklist for advanced ? Please reply.

    • @shrinivas5356
      @shrinivas5356 3 ปีที่แล้ว +1

      Yes

    • @Aryan_Kashyap
      @Aryan_Kashyap 2 ปีที่แล้ว

      Advanced k lye proper concept hona chahiye...ye checklist se kaam nhii chlega 😅

  • @Booklover-du9pv
    @Booklover-du9pv 4 ปีที่แล้ว +83

    I am not able to under stand significace of pogey🤣😅

    • @AbhishekAgarwal-rc9kx
      @AbhishekAgarwal-rc9kx 4 ปีที่แล้ว +5

      Mai bhii 😝

    • @babayoga8206
      @babayoga8206 4 ปีที่แล้ว +36

      To help sir erase board during lockdown 😂😂

    • @aviralsingh4548
      @aviralsingh4548 4 ปีที่แล้ว +41

      atmanirbhar pogee

    • @shriniwashshrma4964
      @shriniwashshrma4964 4 ปีที่แล้ว +6

      @@aviralsingh4548 😂😂😂😂😂

    • @physicsformulas8403
      @physicsformulas8403 4 ปีที่แล้ว +17

      It will be useful for editing the videos. From transition of one scene to another.

  • @DeepakKumar-ne1gb
    @DeepakKumar-ne1gb 9 หลายเดือนก่อน +1

    at 40:35,tan@=h/e

  • @r.p.sharma5796
    @r.p.sharma5796 4 ปีที่แล้ว

    Thank u sir for providing these videos for our exam

  • @Tushartushar-ni3mw
    @Tushartushar-ni3mw ปีที่แล้ว

    Thank you Ashish sir... chote topics revise karne me bohot help hui ❤😊

  • @alurichalapatirao2747
    @alurichalapatirao2747 4 ปีที่แล้ว +1

    Sir your videos are super but please add subtitles to it will bs helpful for so many students

  • @meshramsonali1862
    @meshramsonali1862 4 ปีที่แล้ว

    Mai wait karte rehti hu apke videos ka .. Sir thank u

  • @jaswantsingh8258
    @jaswantsingh8258 4 ปีที่แล้ว +2

    Thank You Sir..👍

  • @balaramkrishna5775
    @balaramkrishna5775 ปีที่แล้ว +4

    Sir slope=h/e

  • @ramanavenkat7496
    @ramanavenkat7496 4 ปีที่แล้ว +1

    Thank You Very Much Sir .... It helped me alot🤩

  • @VishalGupta-jd5vh
    @VishalGupta-jd5vh 3 ปีที่แล้ว +1

    At 33:43 Sir i have a doubt ,if we increase the frequency of the radiation then the kinetic energy of the radiation also increases so electrons which were not coming out previously due to less energetic photons can now come out by absorbing the higher energy photons, so number of photoelectrons will be increased and so photocurrent will be increased

    • @jeevotthamshenoy3269
      @jeevotthamshenoy3269 3 ปีที่แล้ว

      No bro...there is no relation between no of electrons and frequency... As intensity increases more photon will be there and the case u told happens...

    • @Dr.dhumketuIITDholakpur
      @Dr.dhumketuIITDholakpur 2 ปีที่แล้ว

      Frequency bdane se no. Of photon badte hain eak photon ki k.E nahi badti.

  • @aviroopjana4971
    @aviroopjana4971 3 ปีที่แล้ว +2

    first of all thanks a lot for these awesome checklist session, and i would like to suggest one thing that ...sir please provide us the notes of these lectures too....it will be a great help as many student can save their time...again thank u very much!!!

  • @aksingh3167
    @aksingh3167 ปีที่แล้ว +2

    You are a legend sir.

  • @SubhashSingh-lb2jy
    @SubhashSingh-lb2jy 4 ปีที่แล้ว +2

    Sir slope galat he tan@=h/e hoga
    at time 40:33

  • @udaypatil1764
    @udaypatil1764 3 ปีที่แล้ว +2

    sir at 40:40 there is one mistake slope should be h/e not h/v

  • @babayoga8206
    @babayoga8206 4 ปีที่แล้ว

    Thanks... Best lecture on TH-cam

  • @SidharthjainSingla
    @SidharthjainSingla 4 ปีที่แล้ว +6

    Sir please i beg you, where i can watch booster classes,i dont find it,i searched the whole websites,but i dont get it, please sir tell me where i can watch the booster classes videos

  • @shekharsharma7869
    @shekharsharma7869 3 ปีที่แล้ว +2

    32:43 pinch off voltage kya h sir

    • @mustafasayyad824
      @mustafasayyad824 3 ปีที่แล้ว

      Voltage after which saturation current become constant