In short what I learnt is, PE is stored in a system due to its interactions internally. If the charges are opposite and are left alone, they will expend this energy and accelerate towards each other. And same with block and earth.
@@hcverma2928Sir ,i am Harshit, - to deal with the problem of Dual nature of light , I discover '' Morse-code model of Light '' ,this model proof "non monochromatic" nature of light. and this model is also explain "Radiation effect" . this model explain clearly ,why does Light "Diffract" . sir please pay attention to my model, it can help in physics.
@@hcverma2928sir i have a question if light is an em wave then it had electric field and as range of electric field is infinite, it should interact with particles at infinite distance from it's line of propagation, but it is not possible with particle nature. Does light do the same or not, if no then why
If people teach their subjects like Verma Saheb, then every subject would be full of fun and enjoyment. I have never seen someone like him inject so much passion into his work as he did. Mashallah. I watch his lesson like an interesting movie scene. He knows how to convert the most difficult concept into a piece of cake.
and as a realtime case, as the person lifting object is standing on Earth, he lifts the mass from groud to height 'h', so for the 3-body system: person, object and Earth, the net energy of system doesn't change. For a two body system (Object and Earth), the energy of this system increases by 'mgh' as the work is done on an external agent on the system. The potential energy of system/object increases to mgh while change in potential energy of Earth is negligible or zero.
sir please take lectures from class 6th to 12th as a lot of people have fear from physics but if you teach them then definately it is so benificial for them
Sir, I remember, in 2003 Deb Mukherjee sir taught me the same in his krishna Apartment basement. Heard you two were collegues in science college. Regards Nitish Raj, Scientist at DRDO
Respect sr Aapka bhut dhanyawad Jo aapne utube ke madhyam se apna knowledge share Kiya 😊 निवेदन h Ki आप 9/10/11/12 क्लास की physics Hindi me Btae taki Jo bachhe padhna chahte h Aur sahi direction nhi pa rhe h Unhe real physics padhne ko mile Dhanyawad,,✍️🙏🙏🙏
I understood from this video that it is very important to decide the system while applying work energy theorem. Moreover for potential energy which is especially conceptualised for conservative field should also be taken care. Generally people say work done = change in Kinetic energy but work done by whom? Remains unknown unless we specify the force which is responsible for work done. Thank you HC Verma Sir ❤.
@@hcverma2928Sir ,i am Harshit, - to deal with the problem of Dual nature of light , I discover '' Morse-code model of Light '' ,this model proof "non monochromatic" nature of light. and this model is also explain "Radiation effect" . this model explain clearly ,why does Light "Diffract" . sir please pay attention to my model, it can help in physics.
@@user-cah036 whats the radiation effect? and all the properties of light are already well explained, and btw literally everything has dual nature, what will you do to explain dual nature of just light?
@@aryanaman7Sir work done on the system means we can say if work is done on any of the particles of the system and if so still net work done becomes zero , gravity and external force acts on the same block opposite to each other 😅 please explain
@@sauravhere... if you have earth and block to be one system then you cannot take gravity as external force albeit it becomes internal force.. Sir had clearly said in this video .Watch again!
That is why i love professor hc verma even i am doing bsc anaesthesia but still reads concept of physics by hc Verma sir ❤❤ no one is like professor hc verma the way sir has explained michelaon Morley fringe experiment was magnitude hc Verma sir is father of physics ❤
Search latest tweets of @lal_shiban Click & go to pinned tweet. It's a question paper 📜 No Hindu professor could reply. Now ask Sir to solve Q 5 & 11 Right!
Sir, I thank you very much for this amazing lecture. I still cannot believe that I just met you a few weeks ago when you were in Jaipur, at the Jaipur National University. There, I secured 2nd position in the quiz, and was awarded by you. Sir, thank you for everything. Due to all the hecticness, I was not able to talk to you, but I just want to say, that you and your fellow teachers have again sparked a joy for science and maths, which I had as a child, but lost it due to competition. Thank you sir ❤ 🙏🙏
Potential energy is of a system (earth + mass ). Therefore, the work done by the gravity , which is. Not an external force, is. OT being considered. Thank you sir
It can be also understood as follows. Positive work done on a particle increases the kinetic energy of particle. Negetive work done removes that kinetic energy and converts it into potential energy.
Internal energy doesn't shows any change due to not change in temperature of particle Kinetic energy doesn't show any changes because velocity of block is same Potential get change because we took it up from a position to height H Truely Legend of his subject we had honour to have luck to seek guidance of sir @HC Verma If we only consider the block change there is no work because mgh + - mgh cancel out each other but if we consider both block and earth potential energy with external force applied by a body the system potential energy will increase with mgh and the work done will happen
Other way to think work done by normal force when you lift the block which will be in direction of movement of the block and we know that since block is not accelerating Normal is equal to mg.
Imagine a water pipe with water flowing through it. If there is a section where the pipe is in parallel, the water should split up and flow into the three different pipes in parallel. Similarly, current divides into the three wires in parallel, maintaining a consistent pressure (voltage) across all branches.
oh sir i have no shame to say that never thought why its +mgh when net work on the body is zero but today as u explained i got it thank you sirrr and when we say it has mgh its when we are ext agent and earth and body is system and when if we only see body then no change in its KE and net work is also zero and potential has not yet came into picture got a new lesson thnx lot
System 1: When earth and block different systems. No net change in energy in the block when we lift it up because work done by gravity and work done by us cancel each out. Potential energy of the block will depend on the square of distance between the centre of block and centre of the earth. System 2: When earth and block both are 1 unit. Then net energy of the block is +mgh only (not -ve) because the external force acting on it is acting away from the unit (both earth and block). And work done by gravity is not considered because "resultant (or net) energy of a body is the sum of external forces acting on it." But since we considered earth and block as 1 unit, work done by gravity is an internal force, so we ignore it. I hope I can explain it correctly :)
@@sukanyasinha48 I meant normal force. Let's say a man is holding a block on his hand and here 1. Gravitational force is applied 2. To cancel out that force a normal force from hand is applied to it . 3. A additional force my man is required to move the block up
My question is " Does a charge undergoing acceleration within a gravitational field emit radiation? " I have been thinking about this situation for quite some time since my 11th grade and could not come up with any possible answer. I have also asked this to many physics teachers and professors but could not get a satisfactory response. According to classical electromagnetism, an accelerating charge emits electromagnetic radiation. However this scenario touches upon the intersection of two fundamental theories in physics-electromagnetism and general relativity.
well have you ever seen an accelerating charge outside gravitational field? these two forces are different and doesn't interfere each other . in short yes it does. but if you have some reason in mind that it should not or whatever bought this curioisity please share
According to Ohm’s Law, Current is directly proportional to the Potential Difference, but in case of Alternative Current, why the current is inversely proportional to Potential Difference. Why there is contradiction between two expressions:- (i)Ohm’s Law:- Current(I) directly proportional to Voltage(V) But in case of Alternative Current, why the Current is inversely proportional to the Potential difference, due to which energy loss is minimized during the transmission of AC Current at such high voltage(11kV) i.e., Power(P) directly proportional to Current(I) and Voltage(V) =>P=VI =>I=P/V
Mechanical energy will always remain same As we take the block above the ground potential energy increase while kinetic energy decreases As, mechanical energy = P. E. + K. N.
sir I have two questions 1)if light has no mass then why it is attracted by the blackhole? 2)std 8th sse padhaya jata hai ki electron nucleus ke around circular orbit me motion krte hai but ek orbit me toh multiple electron hoge ,so internal repulsion ki vajh se circularr motion kaise possible hai and actual motion and path kya hai electron ka??
Sir , aapke lecture ka wait karte rehate h ab to aap koi course ya cantaint hi nhi dalte ...plz sir physics ke koi na koi video dalte raha karo ....sir ko koti koti pranav ❤,🙏
Sir i have a doubt We know that work done by magnetic is always zero as the displacement is perpendicular to force by magnetic field, we can say it doesn't depends on the path it moved on which shows conservative nature So, why do we say magnetic field is non conservative in nature. Sir pls pick my question, u r my inspiration in life and thank you.
When we Put the water in the vacuum or in the space the water is not boil according to the definition of boiling point the vapour pressure of a liquid is equal to the atmospheric pressure so liquid will boil so in the vacuum atmosphere pressure is zero and liquid vapour pressure is also zero when we put the liquid or water in the vacuum why water is not boil ?
instead of doing these things sir please upload your PHYSICS lecture which gives us more clarity towards physics and we are future of india so we exactly need this fruitful things ❤
Any question's level can be determined when a person with known intellectual prowess is dealing with that question..Simply put, it depends on the person who is dealing with that question.
Sir please explain this paragraph magnetic field never does any work on charges as magnetic force acts in direction normal to their motion. We can modify this statement as net work done by magnetic force on moving charges is always zero but it is possible that there are work done involved by magnetic forces in a system but equal positive and negative work causes Ano net work done. In the phenomenon of electromagnetic induction magnetic force does negative work on mechanical agents who are displacing a body which contains charges and extract energy from mechanical work and does positive work on charges in inducing EMF in the conducting bodies which may cause induced current to flow if circuit is closed. Always total work by magnetic forces is zero in system but it acts as a mediator in transformation of mechanical energy to electrical energy
बचपन में फिजिक्स में मेरा बहुत इंटरेस्ट था IIT Clear कर सकता था लेकिन अच्छे टीचर न मिलने के कारण मैं कम्पटीशन नहीं निकाल पाया 🙂🙂 और कैमिस्ट्री वाले ट्यूशन के लिए लूटते थे 🙂🙂
@@hcverma2928 yes sir , app se mane physics shikhana suru kiya jab bhi ma khali batha hua hota hu to ma app ke bare me sochata hu , app ke. Padhne ka andaj , or sabb kuch , hope ki ma app se mil saku , love hcv ❤😊
Good Evening Sir. Sir I am Ayush Kumar of class 10th. Sir with due respect I would like to ask that in Nuclear Physics Alpha, Beeta,and Gamma rays all are related to nuclear reactions and related to nucleus but Sir Beeta rays are nothing but fast moving electrons and electrons are outside the nucleus of an atom. Then how the reactions of Beeta rays are Nuclear reactions? With Regards:- Ayush Kumar. Class 10th. St. Jude's School, Gorakhpur.
The thing is that matter can be created and destroyed. The beta particles are created by conversion of proton into neutron and vice versa!! There are two types of beta reactions. Beta plus and beta minus. Beta reactions happens when neutron converts into proton or vice versa to make the unstable nucleus stable! If a neutron converts into proton, a negative particle which is electron is created by the law of conservation of charge! If proton is converted into neutron ( which has a special mechanism) then a positive particle is created called "positron" which is different from proton!!
Sir aapke physics teacher kaun the ? Kya aapke time par itne achhe se concept sikhne ko mil jata tha ? Pls reply sir I'm waiting for your reply 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
so id i summarise this whole thing it is that yes net work done in universe is always zero because of law of conservation of energy . but when we say energy increased we restrict our system to certain part and the work done inside system always cancel outs due to conservation of energy principle now only external agents work contributes thus energy increases
If a man is at rest and he saw that moving charge creates the magnetic field and women with same speed as the moving charge is travelling then for the man there is magnetic field and for women there is no magnetic field. As the moving charges create a magnetic field is a fundamental phenomenon of electromagnetism . So sir what will be your conclusion on it plz explain me
Sir I have a question on sign convention for acceleration due to gravity (g). In ncert textbook it is written that we will take acceleration, a to be positive when it is in the direction of velocity, that is, in the direction of motion. The acceleration, a will be taken as negative when it opposes the motion. My question is if we consider that particle is moving in the durection of -y axis with some acceleration तो uski velocity or acceleration uski motion ki direction mein hai toh is case में kya g + hoga ya negative Please 🙏🏼 reply sir
The signs of vector quantities can be easily understand if you only thing in terms of direction of motion which is the direction of velocity! The very first step is to set which sign will you assign to the direction of motion. By convection, we use x direction and y direction as positive. That means if the velocity is in the direction of them it will be positive. When you've decided the sign to use for direction of motion, use it in all you calculations. Vector sign doesn't change in every step of your calculation. You've to decide this very first when start calculations. And it's totally your choice!! And the answer of your question is -g. When you say -y axis. That means you've already given sign to direction of motion!! The velocity and acceleration both will be negative for Falling body.
@dhruvbaghel466 thanks bro. You have cleared my doubts. Now I understood if I take a fix Cartesian system and according to that I have to take the signs of vector quantities.
@@Aimhappy829 yes you are right. but still i can see some misunderstanding there. so i'm just elaborating.. if you have seen in maths, we conventionally assign signs to axes. if you're familiar with that just use it blindly by thinking that "the sign for axes are the sign for velocity. if body is moving horizontally right, velocity is positive other wise negative and same for y and z axes. since gravity is always downwards, it will always be negative in direction in y axis. Or think of this equation x=vt. the sign of v will determine the sign of x. that's why we say that positive x direction means velocity is also positive.
Namashkar sir I am Deepak ,(class 11th) Sir jab hum ik ball ko horizontally ghumate hai apne upar jo ki string se bandhi hue hai to jab wo Puri tarah straight ho jati hai tab tention ko to mrw²balance kar leta hai lekin us samay gravitational force ko konsa force balance karta hai jisse wo ball niche nahi aati
#Question If a two blocks are resting on a frictionless plane connected by a spring. Then if external force is applied then why does the spring compress. Shouldn't it just move along with it as a system as in friction less plane even if small force is applied blocks should move.
Okay, let's assume we have applied force on one end of the spring block system, now in order to move the 2nd block, there should be some net force on the other block, which can only be provided by the spring force as it's the only medium of contact between them, and since a compression is required to generate enough tension to move the other block, the spring compresses even though the system is placed on a frictionless surface.
@@ayyajay Here you are saying enough force will be generated through compression of the spring but in a frictionless plane even a small force which can be negligible to us can move heavy objects. Also shouldn't here the spring act as a rod or something as since the applied force is so low required to move the blocks it doesn't really need to compress.
I totally understand your point, but here's the thing, We cannot consider the compression to be negligible in any case, because there is always some spring force required for the other block to move which cannot be generated without compression. And since in the FBD of the other block, only 'kx' produces acceleration, considering the compression to be negligible will lead to the result that the second block is not moving, which is not possible. Compression could be really less, and so will be the acceleration of the other block but cannot be considered negligible. That's my explanation.
@@ayyajay I understand your explanation but, for the spring to compress ,shouldnt there be some support from the other side which is absent here due to frictionless surface
I guess it's true for both the cases, it's just that we are not usually able to visualise compression in case support is absent. Although, i believe there will be compression in both the cases, I'm still researching about the question and will be back with a more convincing answer (if possible)
This same doubt troubled me for a week and I kept searching for answer until i went through the lectures of nv sir and physics galaxy book , I wish this video had been uploaded earlier
Ek magnet hai jiske magnetic field ka curve bhutt bada bnn raha hai aur ek dusra magnet hai,jiske magnetic field ka curve bhutt chotta bnn rha hai toh kaunsa magnet jayda strong hoga...
Respected Sir, your one reply will be moment to remember for a lifetime & will also act as a source of motivation for this young NEET aspirant !
Love you mere bachhe
@@sakshamsharma5930😂
@@sakshamsharma5930Bhai aapko nahi dena tha😂😂
Keep going young neet aspirant I'm with u
Cringe
Kitne log mante hai ki HC sir India ke sabse knowledgeable physics teacher hai ?❤❤❤
👇
Me while watching video - 🙂
Me while seeing your comment - 🙄
@@ytg6663 are kahana kya chahte ho?
@@premsagarpremsagar3840 Yhi ki Likes ki bheek maag kar kya milta hai
@@ytg6663 yaar Bhai ek alag hi sukun milta hai 😂
@@ytg6663 yaar agar aapko koi dikkat hai to bolo main abhi comment delete kar dunga
I wish we had a good teacher like you.
You are a great teacher.
He wrote a book for jee mains
@@teamf4xhades379 I knew it.physics book of HC Verma sir,,famous book
alakh pandey is there for you
I am so blessed that I read HC Verma physics when i prepare for jee mains. 😊😊😊 Thanks 🙏🙏🙏🙏🙏🙏 sir you are Kohinoor 😊😊 for us .
Sir main apko apne gurujii manta hu you are vey very excellent teacher of physic.
In short what I learnt is, PE is stored in a system due to its interactions internally. If the charges are opposite and are left alone, they will expend this energy and accelerate towards each other. And same with block and earth.
Is it true for elastic potential energy to
Sir Resoect to you for your books!!! Never made life easier than a simpler language from yours.
A new lesson... No question is a simple question. It depends upon our perspective.
Depends on Knowledge and experience
yes.
So true. Each time we take it easy, he proves us wrong!
@@hcverma2928Sir ,i am Harshit, - to deal with the problem of Dual nature of light , I discover '' Morse-code model of Light '' ,this model proof "non monochromatic" nature of light. and this model is also explain "Radiation effect" . this model explain clearly ,why does Light "Diffract" . sir please pay attention to my model, it can help in physics.
@@hcverma2928sir i have a question if light is an em wave then it had electric field and as range of electric field is infinite, it should interact with particles at infinite distance from it's line of propagation, but it is not possible with particle nature. Does light do the same or not, if no then why
If people teach their subjects like Verma Saheb, then every subject would be full of fun and enjoyment. I have never seen someone like him inject so much passion into his work as he did. Mashallah. I watch his lesson like an interesting movie scene. He knows how to convert the most difficult concept into a piece of cake.
Can you explain this to me. I don't understand Hindi
and as a realtime case, as the person lifting object is standing on Earth, he lifts the mass from groud to height 'h', so for the 3-body system: person, object and Earth, the net energy of system doesn't change.
For a two body system (Object and Earth), the energy of this system increases by 'mgh' as the work is done on an external agent on the system. The potential energy of system/object increases to mgh while change in potential energy of Earth is negligible or zero.
Sir your smile makes concepts of physics as a piece of cake. It tastes very sweet after understanding...
sir please take lectures from class 6th to 12th as a lot of people have fear from physics but if you teach them then definately it is so benificial for them
he should teach from `11th
HC Verma, thanks for making the globe your virtual class audience..cheers to power of internet and youtube
happy diwali sir, i will give my JEE exam in 2k25 all i want is blessing from you
Sir, I remember, in 2003 Deb Mukherjee sir taught me the same in his krishna Apartment basement. Heard you two were collegues in science college. Regards Nitish Raj, Scientist at DRDO
Hello sir what do I have to do to become scientist at DRDO, I am currently in class 11 and studying for JEE
Respect sr
Aapka bhut dhanyawad
Jo aapne utube ke madhyam se apna knowledge share Kiya 😊
निवेदन h
Ki आप 9/10/11/12
क्लास की physics Hindi me
Btae taki Jo bachhe padhna chahte h
Aur sahi direction nhi pa rhe h
Unhe real physics padhne ko mile
Dhanyawad,,✍️🙏🙏🙏
I understood from this video that it is very important to decide the system while applying work energy theorem. Moreover for potential energy which is especially conceptualised for conservative field should also be taken care. Generally people say work done = change in Kinetic energy but work done by whom? Remains unknown unless we specify the force which is responsible for work done. Thank you HC Verma Sir ❤.
good.
@@hcverma2928Sir ,i am Harshit, - to deal with the problem of Dual nature of light , I discover '' Morse-code model of Light '' ,this model proof "non monochromatic" nature of light. and this model is also explain "Radiation effect" . this model explain clearly ,why does Light "Diffract" . sir please pay attention to my model, it can help in physics.
@@user-cah036 whats the radiation effect? and all the properties of light are already well explained, and btw literally everything has dual nature, what will you do to explain dual nature of just light?
@@aryanaman7Sir work done on the system means we can say if work is done on any of the particles of the system and if so still net work done becomes zero , gravity and external force acts on the same block opposite to each other 😅 please explain
@@sauravhere... if you have earth and block to be one system then you cannot take gravity as external force albeit it becomes internal force..
Sir had clearly said in this video .Watch again!
That is why i love professor hc verma even i am doing bsc anaesthesia but still reads concept of physics by hc Verma sir ❤❤ no one is like professor hc verma the way sir has explained michelaon Morley fringe experiment was magnitude hc Verma sir is father of physics ❤
Number 1physics teachers of all time 👍👍
Search latest tweets of @lal_shiban
Click & go to pinned tweet.
It's a question paper 📜
No Hindu professor could reply.
Now ask Sir to solve Q 5 & 11
Right!
@@shibhanlalpandita6975 Sir ,ye tweets Mai kaha pe dekhu ??please tell!
Thank you sir ❤ your teaching your books and everything you have done for us 🙏 helps me so much in studying 😊
Sir, I thank you very much for this amazing lecture. I still cannot believe that I just met you a few weeks ago when you were in Jaipur, at the Jaipur National University. There, I secured 2nd position in the quiz, and was awarded by you. Sir, thank you for everything. Due to all the hecticness, I was not able to talk to you, but I just want to say, that you and your fellow teachers have again sparked a joy for science and maths, which I had as a child, but lost it due to competition. Thank you sir ❤ 🙏🙏
Very nice. All the best.
@@hcverma2928Thank you sir🙏🙏❤❤🥺
congt bro
@@AdityaJee-us1pq
Potential energy is of a system (earth + mass ). Therefore, the work done by the gravity , which is. Not an external force, is. OT being considered. Thank you sir
0:03 amit kumar ji........
Hats off to the God of physics.
This type questions are put on that mind those BOYS always feel PHYSICS .
👍
Every simple question in a physics is very complicated 🙂
Thanks sir
Is video se Kitna concept clear ho gye
All the best
This is amazing!!
Entirely different concept abt. P.E and so precisely explained.
Potential is always defined for a system .
Happy Diwali, sir you are the inspiration for youth that being a BSC student you can rock in your life
😂
It can be also understood as follows. Positive work done on a particle increases the kinetic energy of particle. Negetive work done removes that kinetic energy and converts it into potential energy.
This video makes my concept clear
Thank you sir 🙏🏻🙏🏻
we use + and - as directions also like - is opposite direction and + is with the direction{here direction of force applied by you on the body}
Thank you so much for amazing and interesting lecture.
Internal energy doesn't shows any change due to not change in temperature of particle
Kinetic energy doesn't show any changes because velocity of block is same
Potential get change because we took it up from a position to height H
Truely Legend of his subject we had honour to have luck to seek guidance of sir @HC Verma
If we only consider the block change there is no work because mgh + - mgh cancel out each other but if we consider both block and earth potential energy with external force applied by a body the system potential energy will increase with mgh and the work done will happen
Other way to think work done by normal force when you lift the block which will be in direction of movement of the block and we know that since block is not accelerating Normal is equal to mg.
Sir, you are heart of India. You are indigenous physicist.
🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳
Sir, Great video. Interesting question. Very well explained.
Ye baat baar bhul jaata hu ki potential energy system ke liye defined hai...thnx!😊(class 12)
Wish you were on UA-cam back when I was in school
a message from rochak
seriously sir love to see your videos Sir ! High Respect Sir
Sir why voltage remains same and in parallel connection of wires where as current differs why ?
Imagine a water pipe with water flowing through it. If there is a section where the pipe is in parallel, the water should split up and flow into the three different pipes in parallel. Similarly, current divides into the three wires in parallel, maintaining a consistent pressure (voltage) across all branches.
Mukul, This is an example. Please give more credible and detailed answer.
Because all the branches in the connection have same starting and ending point, so all will have same potential difference and so the voltage
Potential difference across the two junction points is same.. irrespective the current diverges or not
In parallel combination, the end points are same. Hence, the potential difference between the two end points remain same.
oh sir i have no shame to say that never thought why its +mgh when net work on the body is zero but today as u explained i got it thank you sirrr and when we say it has mgh its when we are ext agent and earth and body is system and when if we only see body then no change in its KE and net work is also zero and potential has not yet came into picture got a new lesson thnx lot
Excellent video as always ❤
Kya anand mein hain sir. I wish our maths and physics teachers were like you.
Bhai paper Aisa conceptual ayega pass hona bhi mushkil hojeyga fir school bhi😅
This is very underated channel
Thank you very much sir for motivating me to study physics in a new way👍🏼
Sirji please make a video on how to study physics in a good way?
System 1: When earth and block different systems.
No net change in energy in the block when we lift it up because work done by gravity and work done by us cancel each out. Potential energy of the block will depend on the square of distance between the centre of block and centre of the earth.
System 2: When earth and block both are 1 unit. Then net energy of the block is +mgh only (not -ve) because the external force acting on it is acting away from the unit (both earth and block). And work done by gravity is not considered because "resultant (or net) energy of a body is the sum of external forces acting on it." But since we considered earth and block as 1 unit, work done by gravity is an internal force, so we ignore it.
I hope I can explain it correctly :)
Well if you used " us" then there are 3 bodies total(earth human block) and you forgot to consider normal
@@cuterancesama628 "us" means that external force that causes motion in the block.
What do u mean by "normal" ?
@@sukanyasinha48 I meant normal force.
Let's say a man is holding a block on his hand and here 1. Gravitational force is applied 2. To cancel out that force a normal force from hand is applied to it .
3. A additional force my man is required to move the block up
@@cuterancesama628 That system 3 of yours (where you are also taking normal force) will also cancel out.
@@AS-fo3ew I never said what he is saying is wrong. I thought that forces are not adding up, just reminded him
hello sir I m a student of class 11th currently and I really like the theory of the your book sir,thank you so much for sir😇😇
My question is " Does a charge undergoing acceleration within a gravitational field emit radiation? " I have been thinking about this situation for quite some time since my 11th grade and could not come up with any possible answer. I have also asked this to many physics teachers and professors but could not get a satisfactory response. According to classical electromagnetism, an accelerating charge emits electromagnetic radiation. However this scenario touches upon the intersection of two fundamental theories in physics-electromagnetism and general relativity.
yes. it would emit radiation. why do you think it won't?
well have you ever seen an accelerating charge outside gravitational field? these two forces are different and doesn't interfere each other . in short yes it does. but if you have some reason in mind that it should not or whatever bought this curioisity please share
According to Ohm’s Law, Current is directly proportional to the Potential Difference, but in case of Alternative Current, why the current is inversely proportional to Potential Difference.
Why there is contradiction between two expressions:-
(i)Ohm’s Law:- Current(I) directly proportional to Voltage(V)
But in case of Alternative Current, why the Current is inversely proportional to the Potential difference, due to which energy loss is minimized during the transmission of AC Current at such high voltage(11kV)
i.e., Power(P) directly proportional to Current(I) and Voltage(V)
=>P=VI
=>I=P/V
A very big concept clear and removed misconceptions of mine
Mechanical energy will always remain same
As we take the block above the ground potential energy increase while kinetic energy decreases
As, mechanical energy = P. E. + K. N.
sir I have two questions
1)if light has no mass then why it is attracted by the blackhole?
2)std 8th sse padhaya jata hai ki electron nucleus ke around circular orbit me motion krte hai but ek orbit me toh multiple electron hoge ,so internal repulsion ki vajh se circularr motion kaise possible hai and actual motion and path kya hai electron ka??
Sir you are best I wish I would have got teachers like you In class 10
Guruji, Pranam Nepal se. 🇳🇵 ❤
Thank you sir for your Lessons on Physics, Sir please upload a course on General Theory Of Relativity for Beginners 🙏🙏
Sir , aapke lecture ka wait karte rehate h ab to aap koi course ya cantaint hi nhi dalte ...plz sir physics ke koi na koi video dalte raha karo ....sir ko koti koti pranav ❤,🙏
Great Explanation Guruji...
Would be a great advisor in astrophysics field.
Sir i have a doubt
We know that work done by magnetic is always zero as the displacement is perpendicular to force by magnetic field, we can say it doesn't depends on the path it moved on which shows conservative nature
So, why do we say magnetic field is non conservative in nature.
Sir pls pick my question, u r my inspiration in life and thank you.
Pls pick this question
Fantastic explanation sir please
Keep uploading this type of videos its really helpful for us ❤
Thank you, I will
@@hcverma2928 its very inspiring to hear u sir
When we Put the water in the vacuum or in the space the water is not boil according to the definition of boiling point the vapour pressure of a liquid is equal to the atmospheric pressure so liquid will boil so in the vacuum atmosphere pressure is zero and liquid vapour pressure is also zero when we put the liquid or water in the vacuum why water is not boil ?
Because vacuum has no temperature.
Sir 🙏🙏
Naman h apko
your smile is awsome sir
Sir, please make a video on different forces and torque on a moving cycle
Thanking you sir for this wonderful concept ❤
Your teaching is wonderful as always
Thnx sir mera doubt bhi tha ab solve hua
I really appreciate your each lessons sir....❤
instead of doing these things sir please upload your PHYSICS lecture which gives us more clarity towards physics and we are future of india so we exactly need this fruitful things ❤
Happy Diwali sir ☺
Amazing video😇❤
Thank you so much 😀
@@hcverma2928 😇💞
I like physics just like your hairstyle sir❤
Any question's level can be determined when a person with known intellectual prowess is dealing with that question..Simply put, it depends on the person who is dealing with that question.
Sir please explain this paragraph
magnetic field never
does any work on charges as magnetic force acts in direction
normal to their motion. We can modify this statement as net
work done by magnetic force on moving charges is always zero
but it is possible that there are work done involved by magnetic
forces in a system but equal positive and negative work causes
Ano net work done. In the phenomenon of electromagnetic
induction magnetic force does negative work on mechanical
agents who are displacing a body which contains charges and
extract energy from mechanical work and does positive work on
charges in inducing EMF in the conducting bodies which may
cause induced current to flow if circuit is closed. Always total
work by magnetic forces is zero in system but it acts as a
mediator in transformation of mechanical energy to electrical energy
बचपन में फिजिक्स में मेरा बहुत इंटरेस्ट था IIT Clear कर सकता था लेकिन अच्छे टीचर न मिलने के कारण मैं कम्पटीशन नहीं निकाल पाया 🙂🙂 और कैमिस्ट्री वाले ट्यूशन के लिए लूटते थे 🙂🙂
Sir please improve the sound quality of your videos so that we get more advantage please
∆U=Work done by conservative force
From alakh sir
Sir aapki kahani ka part-28 bhi upload krdijiye😊
sir it has been very long time to see .
Namaste shri hc verma sir ji ek sapana hai ki ma app se padhu ❤
shayad poora he ho kabhee.
@@hcverma2928 yes sir , app se mane physics shikhana suru kiya jab bhi ma khali batha hua hota hu to ma app ke bare me sochata hu , app ke. Padhne ka andaj , or sabb kuch , hope ki ma app se mil saku , love hcv ❤😊
Kitaab kharid le
@@pri012 hai bahi dono. Vol.
@@pri012भाई क्या नाम है किताब का... बताना प्लीज़ 🙏
Living legend. Hcv sir❤
Good Evening Sir.
Sir I am Ayush Kumar of class 10th.
Sir with due respect I would like to ask that in Nuclear Physics
Alpha, Beeta,and Gamma rays all are related to nuclear reactions and related to nucleus but Sir Beeta rays are nothing but fast moving electrons and electrons are outside the nucleus of an atom. Then how the reactions of Beeta rays are Nuclear reactions?
With Regards:-
Ayush Kumar.
Class 10th. St. Jude's School, Gorakhpur.
The thing is that matter can be created and destroyed. The beta particles are created by conversion of proton into neutron and vice versa!!
There are two types of beta reactions. Beta plus and beta minus.
Beta reactions happens when neutron converts into proton or vice versa to make the unstable nucleus stable!
If a neutron converts into proton, a negative particle which is electron is created by the law of conservation of charge!
If proton is converted into neutron ( which has a special mechanism) then a positive particle is created called "positron" which is different from proton!!
Thank you from deep of my heart ❤️
Sir aapke physics teacher kaun the ?
Kya aapke time par itne achhe se concept sikhne ko mil jata tha ?
Pls reply sir I'm waiting for your reply 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
Sir did not depends on any teacher.He studied from books like Resnick halliday
Resnik halliday.... boht achi kitaab hai...padh ke dekh sakte ho
Pranaam sir🙏
so id i summarise this whole thing it is that yes net work done in universe is always zero because of law of conservation of energy . but when we say energy increased we restrict our system to certain part and the work done inside system always cancel outs due to conservation of energy principle now only external agents work contributes thus energy increases
Why two masses attract each other due to gravitation
Dhanyawaad Gurudev
If a man is at rest and he saw that moving charge creates the magnetic field and women with same speed as the moving charge is travelling then for the man there is magnetic field and for women there is no magnetic field. As the moving charges create a magnetic field is a fundamental phenomenon of electromagnetism .
So sir what will be your conclusion on it plz explain me
Why does an object moves upwards when it is rotated with acceleration relative to the vertical line?
Sir apsee request hai aaap.plzzz ek baar 10 aur 12 ke saree chpterr ke videos bana deen plzz sirr bachoo ki sari problmm solve hojye plzz sir🙏🙏🙏🙏
Sir I have a question on sign convention for acceleration due to gravity (g). In ncert textbook it is written that we will take acceleration, a to be positive when it is in the direction of velocity, that is, in the direction of motion. The acceleration, a will be taken as negative when it opposes the motion. My question is if we consider that particle is moving in the durection of -y axis with some acceleration तो uski velocity or acceleration uski motion ki direction mein hai toh is case में kya g + hoga ya negative
Please 🙏🏼 reply sir
The signs of vector quantities can be easily understand if you only thing in terms of direction of motion which is the direction of velocity!
The very first step is to set which sign will you assign to the direction of motion.
By convection, we use x direction and y direction as positive. That means if the velocity is in the direction of them it will be positive.
When you've decided the sign to use for direction of motion, use it in all you calculations.
Vector sign doesn't change in every step of your calculation.
You've to decide this very first when start calculations. And it's totally your choice!!
And the answer of your question is -g.
When you say -y axis. That means you've already given sign to direction of motion!! The velocity and acceleration both will be negative for Falling body.
@dhruvbaghel466 thanks bro. You have cleared my doubts. Now I understood if I take a fix Cartesian system and according to that I have to take the signs of vector quantities.
@@Aimhappy829 yes you are right. but still i can see some misunderstanding there. so i'm just elaborating..
if you have seen in maths, we conventionally assign signs to axes. if you're familiar with that just use it blindly by thinking that "the sign for axes are the sign for velocity. if body is moving horizontally right, velocity is positive other wise negative and same for y and z axes. since gravity is always downwards, it will always be negative in direction in y axis.
Or think of this equation x=vt. the sign of v will determine the sign of x. that's why we say that positive x direction means velocity is also positive.
@dhruvbaghel466 exactly brother now it is clear . Thanks for your reply
He looks so innocent..😅
But his book..💀💀💀💀
Namashkar sir
I am Deepak ,(class 11th)
Sir jab hum ik ball ko horizontally ghumate hai apne upar jo ki string se bandhi hue hai to jab wo Puri tarah straight ho jati hai tab tention ko to mrw²balance kar leta hai lekin us samay gravitational force ko konsa force balance karta hai jisse wo ball niche nahi aati
Sir apki book solve kar ke physics me interest ane laga
#Question If a two blocks are resting on a frictionless plane connected by a spring.
Then if external force is applied then why does the spring compress.
Shouldn't it just move along with it as a system as in friction less plane even if small force is applied blocks should move.
Okay, let's assume we have applied force on one end of the spring block system, now in order to move the 2nd block, there should be some net force on the other block, which can only be provided by the spring force as it's the only medium of contact between them, and since a compression is required to generate enough tension to move the other block, the spring compresses even though the system is placed on a frictionless surface.
@@ayyajay Here you are saying enough force will be generated through compression of the spring but in a frictionless plane even a small force which can be negligible to us can move heavy objects.
Also shouldn't here the spring act as a rod or something as since the applied force is so low required to move the blocks it doesn't really need to compress.
I totally understand your point, but here's the thing, We cannot consider the compression to be negligible in any case, because there is always some spring force required for the other block to move which cannot be generated without compression. And since in the FBD of the other block, only 'kx' produces acceleration, considering the compression to be negligible will lead to the result that the second block is not moving, which is not possible. Compression could be really less, and so will be the acceleration of the other block but cannot be considered negligible.
That's my explanation.
@@ayyajay I understand your explanation but, for the spring to compress ,shouldnt there be some support from the other side which is absent here due to frictionless surface
I guess it's true for both the cases, it's just that we are not usually able to visualise compression in case support is absent.
Although, i believe there will be compression in both the cases, I'm still researching about the question and will be back with a more convincing answer (if possible)
Sir,can we say that body and earth done work on each other which are cancelled,and externally work done by us brings mgh
Wonderful expansion sir thank you but sir periodic motion main amplitude variable ho sakta hai? And ho sakta hai to sir time period change nahi hoga?
This same doubt troubled me for a week and I kept searching for answer until i went through the lectures of nv sir and physics galaxy book , I wish this video had been uploaded earlier
Please explain to me. I don't understand Hindi.
Ek magnet hai jiske magnetic field ka curve bhutt bada bnn raha hai aur ek dusra magnet hai,jiske magnetic field ka curve bhutt chotta bnn rha hai toh kaunsa magnet jayda strong hoga...
Jiske field lines pass mai hai
I understand by this video that we should not take Questions simply we should try to answer that question . I depends on how we do
Thank you sir ❤❤❤❤ #godofphysics