Answer to a Students question on Gauss Law
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- Опубликовано: 8 фев 2025
- Is the electric field appearing in Gauss's; law due to only the charges inside the closed surface or all the charges, inside and outside.
Interestingly both the options are correct!
Doubts cleared by rajwant sir to solve HCV and now he himself clearing the doubts
True Mann 💯🥰
RJ SIR is too good 🥰💞
RJ sir op and respect 🙏 for HC Verma sir
Tum lakhsya se ho kya
@@uniquelearningexperiment5456 ya bro
The smile sir gives by teaching us has pure love for the kids like us who are just a small growing, energetic, eager, and full of curiosity to learn physics. Sir is such a great gem, after being retired from IIT Kanpur, he is ready to serve the nation. Salute you sir
😊❤️
Gauss' Law is one of the most helpful laws in electrostatics. Agar charge distribution symmetric ho to E nikaalne ka sabse easy method Gauss law hai. Sir's explanation is brilliant as always. 🙏
Gauss law is true for all kind of charge distribution, but its mathematics for uneven surface will be complicated enough. Gauss is still valid.
@@debayanchandra2700 law is true in all situations of course. My point is it's useful in case of symmetry.
not only in electrostatics, this law of flux can be used for other "flowing" quantities like the flow of the velocity of water.
hume to pata hi nahi tha
Can we do practical of gauss law ??
Rajwant sir, while teaching cleared all these doubts himself❤️
Beautifully explained by Hcv sir
@physics lover haha kabhi jokes ko side rakh ke uun se padh bhi lete toh aaj wo joker nahi bhagwan lagte .... jis cheez pe dhayan lagaoge teacher wohi roop mai dikhega
True
@physics lover if rajwant sir is a joker
so don't compare hc verma sir with legend walter lewin
hc verma is not legend in your given conditions
@physics lover he is just a guy who loves physics and comedy and has the talent to do both at once and ya Hcverma sir is the best coz rj sir himself endorses his book
@physics lover namo sir dusre account se aao
Its actually an honor to be taught by you !
Physics is ❤️
People in comments talking about teachers from different faculty 🤡 ab unko kon bataye zindagi mei kabhi na kabhi vo bhi in teacher se he padh ke ange gye hai
😂😂
sir face glows when he’s talking about physics… so proud to be from a country where there’s such brilliant people tysm sirrrr
Alakh sir has teached this chapter very beautifully on you tube. Great thanks to HCV SIR 🙏❤️
I used to prepare for JEE in my school days..now I have switched to different field but still watch his videos occasionally without getting bored..even though I'm understanding only a few things. Back in my time there was no video of HC sir on RUclips but only his book which I have even today in my book rack out of respect and love I have for physics. Maybe I wouldn't be able to do anything in the field itself but I will keep gaining knowledge of physics as a hobby.
That's the real spirit
Seedhe seedhe Bol na bhai Teri aukat ke Bhar tha JEE😂😂
salute to you bhaiya,right mentality
@@suryanshpratapsinghh You all are one of the few examples, that India is an illiterate country.
@@suryanshpratapsinghhunka to pta nhi bhai tere jarur lag rha h
Being a teacher myself I'm really glad that I have told the exact thing to my students that sir told 😊
W_ Sir
Feeling so lucky that i am able to watch your videos. Bade hoke batane me kitna proud feel hoga ki mai us time bhi shri hc verma sir ke lectures dekhta tha , a very huge respect to you sir.
That's why HC Verma sir is the most loved and brilliant teacher respected worldwide. His art of explaining anything is beyond and very effective to learn in an instant.🙏
Wowwww man. What a brilliant, outstanding explanation. Just flawless. I have read many articles regarding gauss law but sir you gave its proper physical interpretation . Thank you so much sir. Huge respect 👏👏
Ye channel la jawab hai. Sir is an inspiration for all Indians.
This is due to the fact that the incoming and outgoing flux produced by a point outside the charge cancelled out and it's net flux due to it becomes zero.
Thanks HCV Sir and Rajwant Sir for clearing my concepts
Proud to be student of Rajwant sir❤
RAJWANT sir is my favourite Physics teacher and because of him I am able to love physics and enjoy it
@@nihalbhamrah4726 kitne paise mile? Chutiyo
ye chote chote doubts hi badkar conceptual problems ban jaate h .... thanks and hats of to sir to help us
In Lakshya NEET - MR sir has cleared it ...Now HCV sir himself clearing this ❤️
The electric field is inversly proportional to r^2 due to a point charge but the area has dimension if one side is nearer other is far then at far side the electric field is less than the nearer side then how it can be taken as 0
Please reply
@@kowstubhakowstu7993 integration kro zero hi milega outer.charge ki.wajah se
Bhai neet clear hua (just asking because I'm in 12th and preparing for neet 2025
Such a beautiful explanation... ❤️
Thanks to our motherland to give us such a wonderful human being, a teacher and a great physicist 🙏🏻🙏🏻
Sir you are an inspiration for every subject student be it physics ,chemistry, mathematics or computer science. I also want to be a computer science teacher who can teach like you .🙏🙏🙏🙏
Me too
Hi Sir ,Envious of today generation, they are learning directly from you.
From Batch 2009 , 12th
Happy To See You on the platform.
Thanks Sir for clarifying this and beautifully explaining the Gauss' Law in simple words.
Gauss Law in Electrostatics states that the closed integral of dot product of Electric Field and differential area vector over a complete surface area of a closed Gaussian surface is equal to 1/ epsilon times the total charge present inside the Gaussian surface.
Please note that the Electric Field in this law is the total/resultant Electric Field due to all the charges present in the given space i.e due to internal as well as external charges.
No one in the present world can explain this better than you sir
You are a living legend sir💖🔥
Respect×♾️
Rajwant Sir ne clear Kar diya tha!!!
Now crystal cleared!!!
Thank you sir!!
Alakh pandey sir in his old videos also cleared this confusion with very much clarity
We are really lucky and blessed to have you amidst us...keep giving away your knowledge to us... there are a lot of things to learn from you...PRANAM from my heart..🙏🙏🙏
This is taught by our most loving R.J sir ❤
Thanks to great H.CV sir 😇
Are u in Lakshaya Jee?
@@ayushkumarsahu606 yup!
😌😌😌
Hazaar baar padhe thhe magar q outside ke wajah se flux 0 kyu hota hai aajtak koi teacher na samjhane ki khoshish kiya aur na samajhne diya.
Dhanyawaad sir😌
Excellent explanation by an experienced teacher . Thanks Sir .
Pranam sir.🙏
I am your pupil
Akhileshwar Nath Pandey
Right now, I also a physics teacher by the grace of you.
I have made a world record of continuous physics teaching.
Saleemians ❤❤
Yes bro for revision I come here
Yes bro😎💪💪saleemians #luxians
Yes
HC Verma is a grandfather of Saleem 😅😂😂
Kas hamare PW ka faculty mei apke tarah koi teacher hota. We love you sir🥰🥰🥰🥰
Rj sir
Thank you sir, for your dedication towards our problems
Hi big fan sir you are a scientist of all time
He is such a great teacher. Expert in his field.
Understood the concept with more clarity thanks sir......
*Just now studied GAUSS LAW and RUclips recommended me this*
Sir you doing great work 🤗🤗 for us thankyou.
You are an ah-mazing teacher! I wish you a successful career with time, Sir.
Physics Wallah faculties already cleared these doubts 💓💓
himanshu sir had solved this doubt without anyone asking !
I had the same doubt, thankyou sir!🥺🥇
Sir aaj aapse padke bhout acha laga🙏
There is no doubt left in this topic ..
Jin students ko aapne live padhya hai vo bhout lucky hai ... 😇
Can't believe the second this doubt popped up in my mind , the very second this video popped up too. ❤️
😃
Timeless beautiful laws explained by ultimate saviour 🙏🏼🙏🏼
Good morning sir.. I'm extremely delighted to listen and learn from ur class.. and I am able to understand the concept very well . Thank u so much sir 🙏
Honorable sir, my physics teacher Honorable Rajwant sir has cleared the same doubt in gauss law lecture in May month
You are great sir.
Q. Electric field has electric potential energy. Where does this energy come from? Will a charge have an electric field around itself for infinite time? If yes then is not it the violation of law of conservation of energy?
@@aaravsrikrishan2248 Okay I will reread but I wanna leave a question so plz answer it.
Q. Charge applies force on another charge and force can only be applied if you have mechanical energy so where does charge get that mechanical energy from? If it can apply the force for infinite time, it is violation of law of conservation of energy.
@@But_Whyyyy no mechanical energy is not needed for force if you drop a pebble from the top of a building it is experiencing a force without any external support.
Why violation of energy? Just because something exist for infinite time doesn't mean that energy is not conserved.. I can have a cookie whose expiry date is infinity doesn't mean the energy is not conserved.
@@mashironmashiron6131 if a charged particle has infinite energy, it means it has infinite mass but in reality, it has finite mass.
@@But_Whyyyy How infinite mass?
I can’t believe Mr sir made this law a piece of Cake for me 😭😭I wanna cry
0:15 shows how humble he is ❤
Concept cleared! Thank You Sir!
Inke bolne ki speed pata nahi kyu alakh Pandey sir se milti julti hai. Toh accha samaz ata hai. Does speed matters to anyone while learning?
Yay
Becoz of Speed Saleem sir misses his true potential as he can teach much better but is fast
@@Drken712real
@@Drken712bro he teaches for jee advanced and jee advanced needs speed .I always studies from saleem sir he teaches so well.
Different student have different choices of teachers.😊
@@Gauravandmummy main khud 1.5x pe sunta hu unke lectures 🥴
Ba kuchh bachho ko lagta hai that's why
You are wrong alakh Pandey sir ka bolne ka tarika inse milti hai
Normal people - Learns new things from the videos.
The smart physicians - "Kaun kaun laksha 1.0 2.0 3.0 se aaya hai like karo."
I mean jo log nahi bhi hote hai unlogo ko kamsekam comments me baksh do. Weird aspirants.
Fr the whole comment section is like this
KON KON UMEED 3.0 , LAKSHAY 2.0 , VISHWAASS 5..0 se HIA LIKE KAROOO
Sir
भौतिकी की समझ भाग 2 market me kab uplabdh Hoga.
Sir please reply.
One of the most adorable smiles i have came across in my life :)
Thank you sir for this video , i was also having this doubt (why E field due to outside charges is also considered whereas charge of only inside is considered) . Again thanks a lot sir. Keep uploading such videos and keep enhancing our knowledge,.,.,.,.,.,.
Field due to outside consider krte h
But is charge ki wajh se flux consider nhi krte..
Field to hogi hi charge h to
But jab baat flux ki aati h
To us charge ki vjh se body me jo flux enter hua vo flux leaving the body ke equal aata h so
Hum use consideration me hi nhi lete
Outside charge ke field ko consider karo ya na karo kyoki iske flux ka contribution zero h
@@Cm-zc2zx yup, HCVerma sir ne bhi yahi baat ache se explain kiya👍.
The explanation is very simple. Because the no. of Field lines entering the surface will be equal to the No. Of lines coming out. For the charges outside
No it's not that simple. Flux is not just determined by number of lines. Consider the case where from one side of surface, very close field lines are entering but from other side, very spaced lines are coming out. That means field is not uniform throughout the space. And hence flux is non zero.
Even if you want to conceive the idea of flux by number of lines, it must be defined as how symmetrically these number of lines are passing through the surface. When viewed from different angles, if this field doesn't change, this means flux is finite and.
The flux due to outside charges is zero because the elementary particle obeys coulomb law. If not, gauss law can't hold true.
good evening professor Verma, I have 2 questions right now, please help me clear these doubts......1. why do bubbles form in water when we keep the water still...I have noticed this phenomenon many times in my school when I used to have my transparent bottle in front of me and interestingly they reappear even if I remove them...I have seen your video of bubbles formed on heating water and I want to know the reasons for both phenomena one you discussed in that video and the other one which I described above ...and the other question - what property does water have that light of every wavelength has no effect on water and it seems colourless to us ? in simple words why is water colourless?....please do tell...
1) because of entropy
2) H2O molecules do not absorb much amout of energy ( only some wavelengths of blue ) and reflects all of it in the spectrum , appearing colorless
एक समान चुम्बकिय छेत्र के लम्बवत जब कोई आवेस गति करता है तो क्या गति करने का मतलब है कि आवेस पर लगने वाला चुम्बकीय बल मे परिवर्तन हैं?
एक समान चुम्बकिय छेत्र के लम्बवत जब कोई आवेस गति करता है तो क्या गति करने का मतलब है कि आवेस पर लगने वाला चुम्बकीय बल मे परिवर्तन हैं?
@@zindalas567 but as you said it absorbs some wavelength of blue then why does sea water appears green
@@zindalas567 and why does bubbles form only on walls of container
beautifully explained sir
hc verma sir op and rajwant sir op🔥🔥
Aaj clear ho gya alakh sir se match karta h ye explation you are great sir
Sir I am a student of class 12th and I recently studied about the concept of electric Flux. My doubt regarding the topic is that, we define electric Flux as total number of electric lines of force passing through a given amount of area normally but why then it have units if it tells us the no. Of electric lines of force ?
Yo! I'm almost 12th pass now so let me help you here since I once had the same question:
Flux can be defined as the number of field lines passing through a physical medium. Emphasis on the word "can". It's not really the number of field lines, because in reality, there are infinite amounts of those field lines. Its easier to understand its orientation if you think of it as number of lines. For an actual definition, they are actually the presence of a force field in a specified physical medium, or the flow of energy through a surface.
Hope this helps!
@@Alactrix yaa... Exactly....
Learning from the legend himself hits different 👌
It is the concept taught by our fav, Rajwant Singh Sir, in Lakshya Jee Batch, (Physics Wallah)
@physics lover mind your language bro....i totally agree that hc Verma is legend but rj is not a street dog ..you should respect every teacher
NKC SIR also told me about this!! Now learning this by HCV SIR himself it's an honour!
Understood 🙏
Just take an example
If we want to supply the water of a tank with two tipes to another
When we close the one tap, another gets too much pressure or sometimes it blast the pipe
Will the same thing applies in A/B=K
Where K is constant
Jaha A aur B milkr K ko maintain kr rha hai but koi aisa condition jisme A ya B ko humlog iss extreme level pe decrease krde ki woh Equation ko hi vanish krde 🙄🙄
Kyuki agr Nicola Tesla explain kr skta hai ki 369 ek aisa number hai jo Universe ke bhut cheezon ko define krta hai
Toh hum kyu nhi keh skte ki
Maths ka hrr ek equation kisi na kisi cheez ko explain krta hai 🤔🤔
My Name Is Mustahsan Tauqeer of Class 10
From Kishanganj, Bihar
1st view sir🥰🥰love your way in which you explain doubts
Feeling proud to be a student of rajwant sir ❤️
Sir, i had a question regarding diffraction of light, is it necessary for the slit, or corners of the object to be sharp to cause diffraction, what if we take two metallic spheres with a very very tiny gap between them and pass the light between them, will it cause diffraction?
Please try to do the experiment if possible.
I also had another question but i cannot remember it now...
Thank you for reading.
🙏❤
Yes , diffraction will occur becoz condition of diffraction is that size of slit or opening must be comparable to the wavelength of light used. And if perfect spheres are brought enough close to each other then , a slit is created which can cause diffraction.
@@sudo_ayush
Thank you for your reply...
@@Krishna_G.101 diffraction will always occur no matter the size of the slit. Diffraction is just the bending of waves when it encounters an aperture or a slit.
For diffraction to be visible (in case of light) the size of the slit must be comparable to the wavelength, so yes you will get the diffraction pattern in this set up as well BUT you will also have to consider the diffraction of waves at the other end of the spheres, so the final pattern on a screen won't be like a single slit it would be complicated but yes diffraction will occur
@@Krishna_G.101 and if you consider the curvature of the spheres at the centre, the pattern would be a lot different.
BUT DIFFRACTION WILL STILL OCCUR, IT WILL ALWAYS OCCUR
@@oscurodous7655 Thank you for your Reply...
The reason is simple that flux due to any outer charge results to neglect as fin=fout, -ve sign for in and +ve for out
Sir I'm a class 12th student and I have the following doubt-
Sir does electric field lines originate from all the points of a charged lamina? If so then there will be infinite field lines from the charged lamina which means the flux will come out to be infinite.
Nice question.
Electric field line are imaginary and only used for imagination of electric field.
Suppose there is a point chage q then its electric field line representation depends on how lazy u r if u r very lazy such that u draw only 4 line in accordance to electric field direction but at the same time if u have to draw electric field lines of 2q u must draw 8 line and for 3q 12 lines.......
In short field lines are not real it's just a representation.
May be u r energetic and want to make a good representatative field line diagram so u drawn let's say 10000 lines for q the u have to draw 20000 for 2q and etc
And remeber flux is not *equal* to no. Of field line but it is just directly proportional to no. Of field lines and the proportionality constant depends on your laziness.
I can provide u whole mathematical reasoning behind this stuff but it's difficult here
We assume the charged lamina to be infinitely long. But it is actually normal length only and relatively infinity. Near the ends of the lamina the field will be little less..
@@ayusharora7136 Thank you so much Sir. I never thought it that way. Thanks a lot. ❤️
@@godson200 thanks a lot Sir
sir why you are so good... love from West Bengal ❤️❤️❤️
Sir how to enroll for emt course part 2...
I can't see the course on website
Thank you so much sir, this doubt was in my mind for a couple of days, now I finally understood the main concept...
Sir my question is. Does friction depends on the surface area.
When we push a heavy object we have to apply very much force. But on the other hand if we install wheels on the same object.. applying less force we can move the same object..while installing wheels we reduced the surface area....sir can u please explane
What will happen if we make the wheels static.
Friction doesn't depend on area of contact. When you install wheels , the sliding friction gets converted to rolling friction which is much less.
Friction does not depend upon surface area. When we install wheel in a body then the sliding motion is converted to rolling motion which reduces friction as a result we have to apply relatively less amount of force to move that body.
Hope it helps:)
Of course friction depends on area of contact, roughness of surface, mass of body,
And static friction >kinetic friction > rolling friction
what a beautiful explanation sir you are amazing!!
thank you so much
❤❤❤❤
Sir i have a doubt :
What is the meaning of moment( like dipole moment, quadruple moment ).
Bhai, dipole moment is a vector quantity when the sum of all charges(+ or -) = 0(means monopole is 0) then we calculate dipole moment and when dipole moment comes also 0 then we calculate quadrapole and when it also comes 0 then we calculate octapole...and so on...hexapole...
Andrew Dotson has made videos on it recently. You should watch those. They are specifically designed to interpret moments.
@Aas Ansari atoms
Moment of inertia me bhi moment h 🙄🙄
@@Cm-zc2zx dipole moment nhi jaante ho ka
Sir has magic when I come this doubt on RUclips and open vedio then before start this lec I got this answer from my mind
Great explanation sir ...... mujhe bhi ye doubt tha but now it's all clear!🤗🤗
Thanks a lot sir!!
Huge respect for you always!🤗 ❤️
This dude seems to be good at physics, he should write his own book.
😂😂😂
Sir have written books on
1. Fundamentals of physics for 9th standard
2. Fundamentals of physics for 10th standard
3. Concepts of physics (2 volumes)
4. Quantum physics
5. Electromagnetic theory
@@ndmaphy r/wooosh
@@studyiitiim207 red itter spotted
Rajwant sir cleared this one beautifully
Sir, in Concepts of Physics (2)
•Question no. 19 ,pg no. 63 (Law of Thermodynamics)
The question says water is heated from (0-4)°C and it's density increases from (999.9 to 1000) kg/m³, which means volume decreases, hence, work done will be negative. So, According to the first law, we must add work done in ∆Q to get ∆U.
But in the answer, it is subtracted. Is it wrong?
Volume change due to arrangement of molecules not by external pressure
In physics, we consider work done (by) the gas to be +ve / -ve. Here, volume decreases, i.e work done by the gas will be negative
(If work by the gas is negative, then work done by external pressure is positive.
kyonki bahar wale charges se jo bhi (uss volume ke andar) electric field lines jayengi, utni hi field lines bahar bhi nikal jayengi isiliye flux zero ayega
Sir,I have just entered in class 10.Sir,I have a very old question and it has made me sleepless for many nights,so kindly solve it.Why in an electrical circuit Potential difference and electric field intensity at each point both always remains constant? I read your concepts of physics class 12 completely and able to understand everything but I am unable to relate electrostatics with electrodynamics.I am able to understand potential difference and electric field in electrostatics but not in electrodynamics that how step by step everything is taking palce inside a circuit.What kind of a mechanism is there inside a battery that it does such a thing? Sir kindly please resolve my doubt,it is my humble request to you?I have already completed class 12 physics and also special theory of relativity.So you can even tell me in terms of higher language.
if you want to understand potentials or physics in general watch " *physics by eugene khutoryansky* " it is an amazing channel, has videos ranging from classical mechanics to quantum physics. He also has made videos about the potentials in a circuit.
Would you mind if I answer you?
Consider two (A and B) points having a potential difference. Now consider the points as two water tanks with A vertically above B.
Points to consider before starting discussion- (1)the amount or water in from one side would always be equal to that of leaving from other
(2) resistances might be considered as the pipe getting thinner at points. Hight resistance= thinner pipe.
There are two cases-
1) series
As we know that water in = water out and there is a single pipe, fir high resistances (ie very thin pipe) more power would be required to pull out same amount of water (power is similar to potential difference) hence higher potential difference.
And different resistors (pipe widths) would have to have different power (potential difference) to pull same amount if water (current) in series.
(2) parallel
In this case, let the pipe at one point be divided into various other pipes of varying widths (resistances)
However here, we don't need the water flowing (current) from each point to be similar because the water out would be equal to the sum of water flowing through different pipes hence there is also no need for change in power of each pipe (resistances).
Hence water flowing (current) through each pipe (resistor) is different but the total power applied to each pipe is same.
Hope it helps 😊 (class 12 brother this side).
Any doubts?
I know this.I want to know how battery is creating that electric field which is constant at every point(it's magnitude).
@@oscurodous7655 That is very poor video not dealing with right explanation.
@@kaminipandey3595 if you want to know the answer either ask on physics stack exchange or on electronics stack exchange. I know the answer but i want YOU to search for it. Challenge your brain and use the amazing gift of Google.
In the very sorry similar way I explained this topic to my students ❤️.
सादर प्रणाम sir 🙏🙏
Saleemians👑
1st comment same problem mujhe lagta h aaj dekhne me bad complete ho hi jayega
How are you SIR
Legend is back with a legendary video
Hello sir good evening
Lakshya neet 2.O mein Pawan sir ne bhi yeh explain Kiya tha ..Now is the god is explaining ❤❤❤❤
Pranam sir ji.🙏🏻
Sir, I am a student of class 10 i have too much confusion in the topic "Refraction of Light".
So I request you to explain the difference between optically denser medium an mass denser medium .
I will be thankful to you for this.plz sir
Amazing ❤
ye agar glti se jee k liye pdhane aa gye , sbka career khtm
Ha😂
I know the answer before sir's explanation bcoz aal the doubts are cleared by RJ sir I was able to recognise the answer before the explanation thanks to RJ sir ✌️✌️✌️
Nice question. It's net e field associate with flux generated from qin. although there is e field From all the charges but flux from outside charges will be zero. Explanation will remain as it is if there is boundaries with different permitivity. Until there is no polarized charges on the surfaces. I think after this you have to consider electric flux density instead of electric flux intensity.
Such a brilliant explanation in a very simple language.
Being a teacher I explained the same thing to my students
I m student of physics wallah
This same topic explained by MR SIR
MR SIR EXPLAINED SAME VERY BEAUTIFULLY
THIS SHOW TEACHER OF PW IS REALLY AWESOME
OUR MR SIR LEVEL IS FIRE
MR SIR NAI GAUSS LAW BAHUT SMOOTHLY SAMJAYA THA WOW SIR.