XII-11-2 Hallwach & Lenard's experiment (2015) Pradeep Kshetrapal Physics

[@Parameswar_Ghosal]

india's best physics teacher . THANK YOU SIR .....................................

[@uttamsahu4577]

Youarebest teacher

[@HardayalSingh-tr8pm]

maybe world's best

[@mranjaan5193]

Where are you currently

[@neelambisht7114]

@@mranjaan5193 he is no more

[@kratikagautam6698]

@@neelambisht7114 😔😭😢

[@satyamtripathi7736]

I smiled suddenly in between the lecture automatically . Perhaps That's real teaching. 🙏🙏🙏🙏

[@sd25170]

1:22:29 min kaise gujar Gaye bilkul pta hi nhi Chala amazing explanation sir 🙏🙏🙏🙏

[@yassermirzabaig]

Best explanation everrrrr thank u very much sir !!!! I would have never understand this in my life unless you have explained it!!!!

[@abhishekrai4325]

Best explanation ever !! Thank You so much SIR.

[@puspendarsingh1880]

Ko

[@abulhasanat2237]

Pradeep sir , Best ever Teacher in the world...

[@mapa9475]

sir aapko shuru se hi btana chaheye tha ki sab electron ke paas same energy hoti h... m thoda bhut ab confused ho gya... but sir ur lecture deserves a standing ovation... love u sir

[@6walterwhite9]

Sir, i tried many lectures, but didn't understand any , but found u ......u were the best!!!!!!!!!!!!!

[@Laralappawedslulol]

sir thanks for shearing ur knowledge with so much dedication u teach with. such a great potential

[@AnitaDevi-wl7tp]

Really you are great sir concepts clear sir -ThankS

[@PoojaSaini-db8uq]

Done Self less job!!! You are a blessing sir..

[@arihantgoel1207]

best physics teacher, I am in love with Physics now!

[@pamachuzin2572]

Thank u sir😃😃 For creating intrest in physics

[@chetandhiman4922]

You r the best sir Thankyou very much sir

[@nk-gw7cs]

u teaches everything in detail....thank u very much sir....

[@nitik4453]

Sir in stopping potential at 33:45 timing ,what is + plate signifies. Sir please reply fast?? I am waiting for your reply🤔🙄

[@study-pointonlinelectureje1161]

sir plz suggest the way for preparation of iit jee

[@shivamkumar1806k]

awesome..... but plz make short video

[@saifullahkhalid7745]

best teacher evr

[@Parameswar_Ghosal]

sir if we change the metal surface , then what will happen?

[@hsbgyan7147]

Thank you sir, best teacher in world. Physics

[@arbaazqazi5481]

Sir can you upload some videos regarding special theory of relativity! Some phenomenon of this theory i.e Time dilation etc. It would be really kind of you!

[@AkAk-to8xq]

Something like twin paradox

[@manjeetsingh-jp9zf]

something like quantum mechanics

[@nasiruddinmirza2127]

Colour is characteristic of frequency and frequency is characteristic of energy source (E=hf), if we first cover a light source with red wrapper and then with blue wrapper then why we are able to identify different colours in either case as in both case source is same and so frequency also... ?

[@khushichaurasia7599]

Sr NCERT ke salution bhi upload kr dijiye sr ...

[@postivevibes5988]

thank you GOD (Pradeep sir)

[@abhieditz3728]

You are great sir

[@rahulchavan1599]

Awesome explanation

[@Kabhi_Kabhi_Aditi_]

Excellent sir.... You way of teaching is amazing.... I never seen such a dedicated teacher.... Those students much more lucky that they got a chance to read from you live.... Thanks a lot sir... For giving your 100%

[@gopinathmallick8471]

Badiya..bahut badiya

[@vikramrao1024]

thx so much........... jay mata di

[@vinodSharma-ny5oi]

U r the best teacher of physic

[@muhammadshakil5802]

the electron will travel towards the -ve potential with some KE but also at the same time will be attracted by the +ve potential on the left electrode..but the electron travels towards -ve potential anyways...so that must mean the the forward KE minus the positive potential will give the net energy with which the electron travels and that energy must be equal to -ve potential...i am a bit perplexed..pls clarify if i am wrong

[@prityverma9398]

Sir u r the best teacher ever of physics aur waah...sir ji tushi great ho

[@friendly_gadget]

At 9:40 ,sir INTENSITY IS LIGHT PER UNIT AREA, SO IT DOESN'T MATTER THAT HOW MUCH LIGHT IS COMING THROUGH WINDOW IN INTENSITY.

[@sandipshaw5469]

What an incredible teacher

[@nikhilkhokhar3737]

sir I think u r the father of modern physics

[@vlogswithaakash3097]

Va re

[@satyamtripathi7736]

Not only modern, but also classical physics

[@personal_blog_2175]

thank you respected Sir

[@nasiruddinmirza2127]

Sir plz clear my doubts.. I have been trying to find out the answer for very long time.. No one could answer me correctly Colour is characteristic of frequency and frequency is characteristic of energy source (E=hf), if we first cover a light source with red wrapper and then with blue wrapper then why we are able to identify different colours in either case as in both case source is same and so frequency also... ?

[@chanderbhanjangra9849]

India's best teacher

[@harikrishnanrg264]

Superbbbb

[@manjeetsingh-jp9zf]

can it be right to say higher the frequency ,more negative is its stopping potential

[@manjeetsingh-jp9zf]

can anyone reply

[@shivendusinghshivam2580]

Yes it is right Frequency is directly proportional to stopping potential And by definition stopping potential is a negative term

[@ASW841]

Sir kindly ye bataye ke frquency ka light ke colour se kiya relation ha?

[@technicalfunda1981]

Sir u r great....means every compliment is less for u...u know what u helped me do much in class 11 as well as in class 12 ...u make me undrstood all the concepts of physics...that makes me toh get highest marks in my class...in our school..nobody focus on concepts bt u r different froms other ...i m unable to understand how much u have a clearification of all the concepts nd from which institute u have got all these knowledge ..i wanna write more about u becoz how much u helped me u cant imagine...i wanna met u ones in my lyf..nd apprrciate ur work...thanku very much for sharing your knowledge with us..u have a great personality..u r the father of physics..your way of explaining is really great i wanna appreciate u more...sir..😋😋😊😊🤗🤗🤗🤗🤗

[@aditisharma5638]

Sir I have a confusion.plz solve it. In hallwachs nd lenards expe.first we put light of apt frequency on cathode (A)-ve and see that e- moves to anode (B)+ve. And when we say that we give the voltage in negative to anode (B) it means anode and cathode are interchanged . And now we put the light on new anode (A) and try to emit the e-.is it right?... In this condition why current does not flow.rather e- have path to flow this anode to🔋and then cathode.cathode also repel the photo e-.plz reply

[@waqasalam4732]

Sir u are best but sir can you upload some topics about special theory of relativity and other related topics with it

[@zoyaansari5461]

👍👍👍

[@satpalkumar5549]

well explained .

[@easyphysicstutorial3613]

Sir how can we give different colour of light pls explain if source is same

[@physicsfromzerotoinfinity6118]

Missing you sir, u have taught me a lot,,

[@parth-mn7vu]

Thanks alot sir

[@nagpuripottaanimation2327]

Big fan sir✌️✌️👏👏👏

[@AartiKumari-lu5jr]

Thanku

[@vlogswithaakash3097]

Hy aarti

[@ShawnDypxz]

I have a question. It'd be better if you cleared out my doubts. Sir, In the graph between the frequency of light and photoelectric current (keeping intensity constant), you said that the current increases slightly and you've done the same thing in the graph too. The no. of electrons remains constant but why there's slight increase in the current? I tried this one with Phet Simulations and the photoelectric current increases significantly? Why does this happen ? Please reply , Sir! Is that due to the increase in velocity of electrons that increases after electrons are ejected due to increased frequency of light ?

[@bhavya5508]

currect increases when voltage is applied to plate ...its just that more electrons will b attracted to plate rather than few so current increase

[@crazypetals4852]

sir plz say numbers in english not in hindi

[@dejavuboyis2485]

Awsme sir

[@sarithasalian6958]

IS THERSHOLD FREQ IS SAME AS MINIMUM STOPPING POTENTIAL

[@amitpandey7799]

i think maximun stopping potential

[@AnkitaYadav-vx5zo]

Sir ....energy ka intensity k saath koi relation nhi .....to kya wave theory wrong h

[@thanoskumar5107]

God of physics

[@jayvirsinghbaghel917]

why we Do not use AC arrangement

[@nkd325]

Sir if power is function of intensity and colour is function of frequency ..then energy=frequency × planck's constant ...how make sense...confused 😑😑😑

[@dharmendrachauhan442]

you nailed it Sir

[@ramubhandari5907]

sir how does the current flows without resistance or load i think it implies a short circuit isnt it? plz reply sir(in hallwach and lenards experiment

[@anasraeen2]

You are great sir brilliant!!!

[@jagatnarayan2515]

Awesome

[@hemantkumar7673]

Pls sir clear my doubt sir as we know metals are lustrous that is they can reflect light . so when we fall light on metal having shiny surface ,light will be reflected so how will the electrons deep inside the surface with higher work function will get energy to come out ? please clear it sir

[@shivendusinghshivam2580]

Koi bhi substrance 100 percent reflectors nahi hota hai

[@siktayadav6811]

Sir can you help me out..! Why this evacuated glass tube is given a way to enter uv radiations...! As they can enter without this also...?

[@siktayadav6811]

And one more thing... Is this nozzle is open..? If open, then how it will be the evacuated tube?...

[@shivendusinghshivam2580]

Glass tube is evacuated because air particles brings resistance in the flow of electron Because air is insulator of electricity

[@shivendusinghshivam2580]

@@siktayadav6811 there is no need of nozzal to be open for entry of light Because it is transparent glass

[@siktayadav6811]

Shivendu Singh shivam oh.. Okay! Thanks.. :-)

[@ashoktomar3630]

Best chanel

[@rajpaal474]

Best....... 🙌🙌🙌🙌

[@sukhvirsingh8970]

how we increase negative potential?

[@DevashishGupta132435LC]

Watch it at 1.25 speed

[@yashkadd537]

Devashish Gupta I watched it at 2×

[@sahilpreetsingh844]

😊😊😊

[@J--bv-Akshatkumar]

I WATCHED IT AT4X

[@trulyyours8007]

Maachudalo

[@amansinghrajput4636]

Nice sir, i extremely getting related to civil foundation.

[@anchaltiwari4642]

Thank u so much sir... U are great

[@kgnstarinterior2118]

can potential be negative sir ........................ pleaseeeeeeeeeeesssssssssssssssseeeeeeeeeeeeee reply

[@shubhamyadavfitness418]

You are great

[@k.tstudytrickk.tstudytrick5354]

in 44:49 sir i thing -ve plate say electron nhi nikalat

[@jagratishrivastav273]

How current increase by changing intensity when one plate(from where we're ejecting electrons) have only certain amount of electrons?

[@Recentbreakingnews]

current will increase by changing intensity until all the free electrons ejects.(means if a plate has 50 free electrons..current will increase until all free electrons(50) not ejected by changing intensity...nd after that current became saturate..

[@archanaverma6671]

Very nice video

[@dharmrajvarude9078]

sir pls. try to new lacture vedios become short between 40 -50 minutes .

[@Vikashsingh-vc4of]

Sir intensity electron nikalta hai ki frequency

[@Pranjalsoni-hs1vf]

Vikash singh frequency ki wjh se 1:10:20 pe h

[@Pawansaini-wf5rw]

Best video sir

[@shivangi470]

Sir u r best, thank u so much 😊

[@Laralappawedslulol]

sir. u r the best

[@walidanish]

thank you so much for the best explanation of photoelectric effect on youtube sir please make a video to explain Black body radiation and special theory of relativity

[@skjha8000]

my.......guru..ji.....

[@nitik4453]

Frequency se hi kyo stopping potential bdalta hai essa kya hai ussme

[@shivendusinghshivam2580]

E=hf Energy of photon is directly proportional to frequency Jada frequency ke light me jada energy hoga Therefore usse nikaale huye electron ka KINETIC ENERGY jada hoga isliye usko rokne ke liye stoping potential bhi jada lagega KE is directly proportional stoping potential So frequency is directly proportional to stopping potential.

[@jeelpatel2216]

Nice tq sir.

[@roentgentech684]

thank you so much

[@bsbclasses2887]

best sir

[@jayhindchauhanchauhan5812]

Thank you sir

[@LegitGamer2345]

Hats off sir 👏

[@adiltantra1]

love you sir just love you

[@monisingh4341]

Thanks sir

[@santoshsir3151]

Very nice lecture sir , but as you said initially the one terminal is - and one is + and we get the current as a saturation but as we reverse the polarity then another terminal became - and first one became + and as first one became + how electrons comes out i didn't get it because according to charge property its contradictory

[@jagritbudhiraja6391]

Hey i have the same doubt. Have you got your answer?

[@warriorking778]

I like it...

[@sanjaydhanu1713]

DEEPAK KUMAR htt

[@NituKumari-ef7cl]

Thank u so much sir 🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗

[@yourlifeyourways1698]

🙏🙏

[@shivivlog28]

U are the father of physics pradeep kshetrapal >> hc Verma sorry concept of physics

[@pardeepsingh-qv8ef]

both are great teachers

[@kirtiazad6083]

No bro u r not able to tell it . Both are undefined.

[@nishantrajput110]

nope brother we don't have any right to compare teachers both are geniuses in their own field..

[@vlogswithaakash3097]

@@kirtiazad6083 tera baap bar le

[@kgnstarinterior2118]

ek accha teacher woh nahi hota jise zyada knowledge hoti hai ....... ek achha teacher woh hota jiski bat hame zyada achhi trah samach ati ho aur rahi comparison ki to hum kisi ko uski knowledge ke besis par yahan judge nani kar sakte par kyonki hum student to ek teacher ko kase padana chahiye ya kaun concept acchi tarah clear karta is basis par to judgement zaroor kar sakte par kis ki judgement kitni sahi hai depent karta but somewhere you are also right

[@rajakhan-hx3lo]

I am

[@jeelpatel2216]

Physics sir this tipe

[@dineshchaudhary8378]

What proves that in wave theory intensity is a function of energy .

[@animalrightsmfa9977]

nyc

[@despacitofan5290]

Adhbhoot.......