Physics ki Band Bajadi hai | Why is Current a Scaler Quantity? Right Explanation by NMS Sir
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- Опубліковано 17 тра 2024
- Recently we created a poll on our channel and the outcomes were disappointing.
We asked the students why the current is a scaler quantity?
98% of students answered that it is a scaler quantity because it doesn't follow the vector law of addition which is a wrong explanation.
Because current density is a vector quantity but it also doesn't follow the vector law of addition.
Many students came up with the assertion that current is a tensor quantity which is an obvious thing because every quantity is called a tensor and then we have different degrees of those tensors.
In this video, NMS sir came up with the correct explanation why current is a scaler quantity and why current density is a vector quantity.
Moreover he also discussed the real logic behind calling quantities as vectors or scalers.
Check out the complete video to unlearn some wrong concepts and learn a new fundamental concept about vector quantities.
#physics #physicseducation #jee #jeemains #iit #jeeadvanced #jee2025 #jeemains2025 #iitjee #nmssir #isaclearning
Ab toh mujhe lg rha h ki , ab tk Maine Puri physics he glt pdi h
Physics subject hi galat hai
Bhai aisa nhi h yeh teacher jee bewkoof bana rhe tumlogo ko baat ghuma kai ..
Baat ghumakar wahi same cheez keh rhe hai .
Joh weak mindset k honge brainwash hou jaayenge 😅
@@AgastyaSinghRajputwhi to views k liye kuchbhi kr rhe hai yeh sir 🤣 inko lag rha hai ham log phd krne wale students hai. Inko kaun bataye hamko chem or maths b krna hota hai .. physics to fir bhi asan hoti hai jitni padhayi jati h 🤣
Aisa teacher ho toh saare sub ko galat prove karde yehi Jo padhayega wohi sahi rahega baaki log toh pagal hai na 🤣
Bhai tumne Puri physics padh Li yahi baari baat hai, scientists bhi nahi padh pa rahe hai tumne cover ka li👍
I don’t know why YT showed me this video. After watching this and after checking the confidence of this person let me add something. Tell me one situation where current follows vector laws. You will not find a single situation. While calculating magnetic field we don’t take current as vector we take “current element” where we associate small element “dL” which has direction not the current. Similarly in current density we take projected area which is perpendicular to direction of current so that projected area makes it vector not the current. Also you can treat it like charge density times velocity,here velocity is a vector.
In AC calculation we add two currents as a vector but in AC it is not a vector it is a sinusoidal quantity which has some phase and frequency and if we add two different sinusoids with same frequency and different phases then we are actually adding their instantaneous values and it follows phasor concepts not the vector concepts. You can say that two sinusoids of same frequency but different phases can be added with the help of phasors and it is similar to vector addition. We are actually adding two sinusoids of same frequency to get a new sinusoid.
Tell me one situation where we take current as a vector. You will find none.
Moreover it is not like “jaroorat k hisaab se define krtey hn…”everything in physics have meaning and significance.
Let me tell you one more point
VerySmall angular displacement can be treated as a vector coz it follows vector rules (standard) while the large or finite angular displacement can not be taken as vector coz it violates the basic rules of vectors.
So it’s not like” jaroorat k hisaab se define krtey hn” there are standard rules which must be followed by vectors.
For deeper understanding read
“The Feynman lectures on Physics volume-2”chapter-2 section 2and 3
Volume-1 Chapter-11.
From where this confusion came from?
When we add current in AC sinusoids (same frequency with different phases) then we can add them by taking it like a vector whose magnitude is max value and phase as angle.
Now one more request in this video he is showing that he knows more than others please take a pause and calm down.
Amazing information sir....
I am sure that sir ko aapka comment read karne ke baad bhi self realisation nhi hoga.
True, yh bkl khud ko pta nhi kya smjhta h, pura info to yh bhi nhi deta😂
Yeh hui na baat
Ur understanding or Electromagnetism is fantastic.....Physics never say "jaroorat k hisab se". It must obey basic Laws
Current is a scalar as it measures the net charge flow rate through a cross-section, direction-independent. Current density is a vector as it describes the magnitude and direction of charge flow at each point, essential for modeling current distributions and applying Maxwell’s equations in electromagnetism
RJ sir ne 2021 mei hi yeh doubt clear kr diya tha 💪
Correct order ke sath bataya tha rj sir love
Ha both sir are JOD ❤
Rj sir full name?
@@Nature._.Beautiful RAJWANT SINGH 🔥
@@HARSHBAIBHAVBwhat was the order
The only teacher whom i admire from heart...will always support you sir♥️♥️♥️
...Sir ka ek famous dialogue"physics me feel hi nhi sirf concept ane chahiye"♥️♥️
Physics Sir ❌️
Physics KING ✅️
Chup saale
Current is scalar becoz of conservation of charge. That is charge flowing towards a point is always equal to charge leaving the point. It doesn't depend on the direction in which charge is flowing.
Very informative video sir thank you so much ❤❤❤🎉
First time I have seen someone correcting a wrong concept but by giving another wrong concept (better say stories) and also being so confident in the process 🤦♂🤦♂
Can you elaborate please?
HC VERMA SIR SE SAHI JAWAB MILEGA YE SAB TO GHUMATE HI RAHENGE
First of all thank you so much, being a physics teacher I can understand your initiative is so important in today's generation, mainly in online platform. Be healthy, With lots of love sir, ..
Thank u so much teacher...in the Era of misinformation...we have someone whom we can trust for appropriate knowledge
Some men, change your perspective about life forever. It never matters where they come from, what matters is the mark they leave. NeelMani sir, long long long time ago, I was your student in TPM1 batch, nurture, 2015-16. You changed my worldview, in a lecture on the last day before diwali holidays. I'll never forget that. I'll pay my debt back. I still remember that poem, "Surya ki kiran ka moksh tab hai jab vo mujhse takra ke tumhaari aakho par padti hai".
This misconception clearance series must be continued... 11 and 12 ka ek Physics ka topic mat chodiye, jisme apko lagta Hain ki widespread misconception Hain please 🙏
Sure
Yes sir humko bhi ye series ki aur bhi videos chahiye plspls...❤❤❤❤❤
Bhai sir ko support tbhi aur videos jaldi ayenge
@@NMSPhysicsISACI think not scalar be tensor
Chutiya ho tum..., Agr itni detail me koi padenga to uska 1lack year me syllabus complete hoga. Aur bachaa neet ya jee quality ni kr payenga. Students ko doctor ya engineer Banna h na ki physicist aur agar physicist in bato ko lekar itne sure hote to ye sari bate books me likhi hoti. Students ko doctor engineer banne do
Sir youtube mein jo bhi teacher sahi phy advance level padhata hi unko hate aur subscribers aur views bahuth kam hota hi .aur unmese aapka channel ek hi .lekin my chahtha hu apkii channel famous hona chahiye thaki sabhi ko sahi phy ka content available mein joga .
Thanking you sir ❤.
Thik hi bole a sab concept advanced me ayega..😅😅
@@kingasif143 Bhai my likes ke liye kuch bhi likhleta hu aur aap mujhse koyi bhi kaho my tho uske baare mein sochtha hi nahi .
Sir we have seen addition, subtraction and multiplication of vectors. Why don't we have division of vectors?
Your initiatives are appreciable !
Keep up the good work 🙌🏻👍🏻
Sir can you pls explain me why in case of EF due to dipole at any theta we cant resolve the distance between the pt. And dipole into its rectangular components ?
Resolve kr ke kroge kya.. Resolve kr ke axial and equitorial par field aa jayega. Jo apko phle se pta tha. Resolve use kro jisko kr ke kaam easily ho jaye,
Sir.... Main bat to ye h na..... Ki jin Quantities ke resultant find krne k liye directions ki importance h unhi k liye to vector addition rule bna h(for theoretical understanding)
Aur jink liye directions ki importance nhi h wo algebraically add kiye jate h.
Regarding area ,it is not like we choose whether there is direction or not , to define an area properly the orientation of area is important, that means to define area completely it is not a choice but a compulsion to have a direction,so it is a vector and current doesn't have direction but have a sense
The only teacher whom i admire from heart...will always support you sir♥️♥️♥️
...Sir ka ek famous dialogue"physics me feel nhi concept ane chahiye"♥️♥️
After seeing your catchy thumbnail, I decided to watch the video carefully. After viewing the entire video, I tried to identify any misconceptions or new concepts you introduced, but I found none. I'm also puzzled by your claim that 98% of students misunderstand this concept (I'm curious about your source for this data 😝. Proper references and justification are needed if possible).
The diagram you drew on your digital board illustrating current addition in branches is based on Kirchhoff's Current Law (KCL). Current always follows this law. It's a well-established principle in physics, which uses scalar algebra, not vector algebra. Therefore, if asked why current isn't considered a vector, one can argue that since current doesn't follow vector addition, it isn't a vector. This explanation is accurate, so I'm not sure why you claimed it's incorrect.
Actually sir is misleading.. to get views.. Do really students in class 12th needs to learn the relativistic concepts...
@@serviceuser6066 You are absolutely right. In the name of IIT, they are doing anything which is not relevant. I don't know where he learned this rubbish thing "zaroorat ke hisab se physics main jo chaho woh kar sakteho...". Total rubbish..
He went from A to B,C,D and came back to A.
Sir par dipole ke wajah se electric field nikalte samay ham dipole ke components kyo karte hai aur r vector ke components kyo nhi karte ye clear nhi hua.
Sir, answer please....
Then , how will you prove theoretically that directions are not important for finding net current?? ( not experimentally)
You are right. Theoretically the statement is correct a & and of course it can be validated practically..it is well understood, that current is basically flow of charge and resultant of 3 & 4 amp at 90 deg will give results of 5 ampere but total charge was 7 originally. Where has remaining 2 unit of charge gone? ....so it will not disappear any where because charge is conserved and therefore it is not vector quantity as it does not follow vector law of triangle addition
@isac please answer this
Great Explanation Sir ....❤❤❤❤❤
Sir aap ne kaun si neyi baat bol di ghuma fira ke wahi boldiya sir aapne. I agree u explained in a better way in a good clarity.
Dear friends, aise mahaan teacher se bachke raho. Ye pressure ko bhi jarurat ke hisaab vector kahega aur jhantoo logic dekar proove karne ki koshish karega.
Sir hamare teacher ne aisa btaya tha ki tensor quantities vo quantities hoti hai jo distribution pe depend krti hai aur uska example moment of inertia, refractive index se btaye the, ek baar aap ise bhi clear krdenge comment mai hi sahi?
Sir my humble request please dipole ka component ase kiu nikal te hain please bata do
Yrr sir you are something revolutionary with ideas
The question could be framed in a more intriguing way: Why is current considered a scalar even though current density is a vector quantity? Additionally, current is never treated as a vector in electromagnetism. In Lorentz's law, the velocity of a charge is considered a vector, and the length of a wire is also treated as a vector. However, current is always considered a scalar.
thankyou sir for this, maine bohot notice kiya and school and coaching mein... master sahab ko proof ka idea nhi hoga toh ratwa denge nature ki property bolke, ekbaar toh mere school wale sir laws ka proof dene chale the, newton second law ko gravitation ke concept se
Almost in every coaching its taught like that, it doesnt follow vector law of addition so its not a vector its sad reality only few can teach things properly. Thank you sir
That one teacher who says 'mere method se nhi kiya beta to galat hai'
He needs to keep his ego aside for such kind of videos. Such type of videos are appropriated but ego that he carries that only his method of explaining something is the only method is not good for any teacher.
The point he made that teachers explain current ki vo tensor quantity hai, i agree to this because there is a lot of confusion among teachers that tensors are third type of quantity along with scalar and vector.
But i disagree with the fact that he thinks explaining that current is scalar by stating it does not follow vector law is wrong. As anything can be disproved using various methods. Their are plenty of reasons that current is not a vector, and not following vector laws is one of them. Students at 11 and 12th level will not get all the tensor stuff, so they are given the simplest reason.
He himself rant for 10 minutes without explaining why the statement "current do not follows vector laws so they are scalar" is wrong because there is nothing wrong with the statement. It is just one way you can explain why current is scalar their are several other ways.
I respect the kind of series of videos, but keep the ego aside that will make you the only thing you are going against. Their is no place of ego in physics. Even the greatest mind of all time disagree, but they learn from the discussion and move.Peace ✌️
But sir also gave the example that even current density doesn't follow vector addition but it is a vector quantity🤔
@SufiyanOp-eg4if I missed the point where he says that current density does not obey vector laws. It does obey vector laws, but in most cases, we do not need to add current densities. We use equation of continuity in most of the cases. If u r at 12th level, u might not understand, but the divergence of current density is the rate of change of charge density. Dot product of current density with surface element gives electric current(Mathematically current is scalar too).
GREAT SIR...LATE PATA CHALA AAPKA CHANNEL FEW DAYS ONLY LEFT FOR JEE ADVANCED☹.....I AM NOT AT ALL PREPARED FOR ADVANCED KOII ACCHE SE SAMJANE VAALA MIL HI NAHI RHA....AAP REALLY PHYSICS KA GOD HOO
Thnk u sir , aaj clear hua I want teacher like u in my life , sir i have one more doubt can u explain why we say current as a fundamental physical quantity ?? As it was depend upon charge and time...
Love You Sir❤
Thanks sir for teaching us right thing
I think we can't consider 3/a and 7/a directly. If the area is identical then same value current should flow through the wire which is 5/a and 5/a.
And for current density we have to consider angle between current and area vector at this location not overall conductor, or wire bent location.
True, yh sir ne bhi pura complete nhi btaya
kamal hai bhai nms sir ka
thank you very much sir
Current is a scalar beacuse it is defined as charge passing THROUGH A PARTICULAR CROSS SECTION IN A GIVEN TIME PERIOD. So CURRENT HAVING DIRECTION DOESN'T MAKE ANY SENSE.
Current density , however, has a direction as it is defined at a particular point (in di/dA, area tends to zero) so it is always a vector. PLEASE REFER TO PROF. HC VERMA'S VIDEO ON THE SAME TOPIC.
So much repect to you for A slap to the teachers who always believe in ratta in physics... I have gone through it...i know, How logic and thought are not cared in this competion phase of surroundings..।। 🙏
How can teacher understand the difference between PhD and selection level study
True
Genuine doubt
Sir dipole wala explain kardo r vector kyun nahi lenge.
MISCONCEPTION is one of the major reason of silly mistakes.. this misconception is the most loved topic for examiner for framing questions.....
Kindly continue this misconception series plzzzz
सर एक और मिस इनफॉर्मेशन है की capacity is नोट प्रोपोशनल to charge Plz बताईए सर
Love you sir , for making me to do love with physic
Sir jii aapne jo likha j=I/A wo vector hai nai kyu ki vector ki division defined nai hai
Agar koi cheez vector hai toh usko vector addition ke rules follow karne chaiye
Haan ye baat hai ki current ki direction zaroori nai isliye hum usko vector nai bolte
Aur rahi baat tensor ki toh moment of inertia ko hum plus two level tak scalar hin bolte hai lekin baad me wo rank two tensor ke hisab se act hoti hai
To current tensor hai ye confusion wahan se create hua hoga
Ek aur baat jo current ka direction hum bolte hai jo dl ban jata magnetic field me wo actually electrons ke velocity ka direction hota hai
Sir aap bahut logical baat karte ho
is par bhi ab socho ki ye batya ja raha h vo sahi h ya nahi.phele jo teachers batate the vo bhi sahi lagta tha
My own hypothesis/interpretation
Vectors are those quantities which are having 'spatial' direction.
I think,
No one should take online classes....after watching your video.
Thank you.
Sir, you are the greatest physics teacher of India.
Because it has a fixed direction(high potential to low potential).
learned something helpful mai bhi vector addition and current he sochta tha
Maylab sir halliday and University physics ne bhi galat likha hai aapke hisaab se?
Thnj please challenge feyman also
Sir should unleash his whole power of physics..!!
Sir can you please tell the reference book from which you are telling all this , so that we can also read it
You can see any lecture online from mit caltech and even hc verma sir video
The Gem❤️❤️💖
Ye to bataye hi nhi ki current kyo vector law of addition follow nhi kar rha hai
Never seen a single teacher who ever said esa hi hota hai except school teacher.
Current flows in the opposite direction of electron flow, direction to idhar bhi define ki gayi hai, to m isse kya maanu? Scalar ya vector? Ya fir yahi bolta rahu ki experiment krke batunga kya hai?
Ab yahan pe nahi bolu kya ki current ki direction ko pehle define kr diya tha or ye baad m pata chala tha ki charge (electron) ki opposite direction m hai?
Bhaut acha sir kuki sach laane ke liye 🙏🙏🙏🙏🙏 samne main math ka teacher hoon 12th pass aur 12years se pada rha hoon lekin thoda bhaut physics ke baare mein bhi janta hoon bhaut saare teacher galat pada rahe the bhaut saal se lekin aapki himmat ko salute hai 🙏🙏🙏🙏🙏
Thank you sir
Sir you are amazing 💖💖💖
bhai samaj me hein nahi aa raha kon sahi hain kon galat????????
Mr. Galat Pandey was once teaching "centrifugal force balances centripetal force" i tried to correct him in comments and the students abused me the comment section
They even said, hum to galat padhenge lekin sir ke khilaf nahi sunenge
Teacher fan following is the biggest road block in a students selection
I have noticed.
He taught many wrong concepts in mechanics in his channel.
@@VedicSanatanDharma453which teachar
Kon sa teacher bhai
@@kingasif143 galat Pandey , urf alakh Pandey
Are bhai wo galat nahi wo trick hai centrifugal and centripetal ko bara bar karke answer nikaoe wo competitive exam nikalva rahe hai achhe se padhna hai wo nit iit me professor achhe se padhaenge yaha adhura gyan mat do alakhpandey sir ko galat bolne se pehle khud clg pahuch jao@@Thephysicsplace
DC Pandey clearly writes current as scalar quantity ❤
You are a real teacher sir
Thank u sir
I shared this video to my physics teacher along with his notes where he taught us that why current is not a vector quantity by giving that example of not following vector addition after that he blocked my number😢
4:16 sir dipole wali baat toh bs ek trick sort of batai gyi thi hume
Hum log pehle pura derive wagera karake chize batai
Fir as a trick to enhance solving speed , ye trick batai gyi
Baaki toh sir this series is extremely helful (concepts fir se click hothe dimaag me)
Guruji ye to batao ku hum r ka component na lekar dipole ka lete hai ???🙏🏻
Let assume r=5 unit, then rcostheta =4 and rsintheta=3, rsintheta ka liya dipole ki perpendicular bisector hoga but rcostheta ka liya dipole er axis barabar electric field aayaga but dono point alag hay. So it is not a suitable process of finding electric field.
We are actually having misconception, we talk about the direction of the wire not the current
Mujhe bhi Kabhi bataya nhi gya ki dipole moment ko hi kyu resolve karte hain, I believe ki isse mathematics simple ho jati Hain coz hame dipole axial and perpendicular point k liye Pata hoti Hain, whereas displacement vector se complicated ho jaygi..
Now I kinda doubt this as well.. 💀
Sir aisi videos banate raho , badhiya samjh aa rha hai , humko bhi or baaki NAAM ke teachero ko bhi 😂
Nice research 👍
Nms sir ke aage koi bol sakta hai kya sir mai aapki sari video dekhta hu kabhi Informatiive hoti hai i like u sir very much😊
I am going to persue integrated phd in astronomy from TIFR and i had this doubt since class 12 that why current density is a vector quantity coz even that doesn't follow the laws of vector addition. After 5 years, my doubt has been ckeared lmao. Kash humare time me bhi ese teachers padhate online
Please read physics again, who said current density don't follow law of vector addition, it follows all laws of vector
It is indeed deeply saddening to see the PhD candidate with unclear concepts being selected in a top research institute like TIFR.
As for the explanation, it is very simple and doesn't demand a video.
J vector= I/ A vector ( has both mag. and direction).
Similarly, J=σ E where E is a vector and in J= ρv
ρ= charge density and v= drift velocity of charge carriers.
This makes J a vector.
And as you know, vectors, scalars and dimensionless quantities all come under tensor matrices, just the orders are different.
Thank you.
Another analogy though unrelated. Despite having direction and magnitude, angular displacement is not a vector because it does not obey the commutative law for addition. But when dealing with infinitesimal rotations, second order infinitesimals can be discarded and in this case commutative property appears.
The direction of angular displacement is different from that of linear displacement for two reasons. First, it points out of the plane because of the nature of angular displacement. It signifies a rotation, as such, there is not any particular direction unit vector in every coordinate space that could represent it. To signify the direction of something that points in every direction on a plane, it is easy to specify it along the one direction we can be sure the linear displacement isn't pointing normal to the plane. This is a much used convention (such as with area vectors, torque, and many others). As usual as well, we use the Right Hand Rule.
The second, and perhaps more important reason is that we always want to ensure that the angular displacement does not correspond to any true displacement that would be in a radial direction.
Sorry for copying, I was too lazy to type.
Now one question time is vector or scaler
Abhi current electricity nhi pdha
But ye smj to pura aagya sir
Charan sparsh🫡😍
Sir please write a word for manish raj sir
What do you think about his ??
Normal teacher jo 11th ,12th pdhate h unhe bhi pta h . Kyuki class 11 th m area ko scalar pdhate h aur flux m area ko vector bolte h . Agar direction ka effect hota h to vector m consider krte h
Haan Jo bol rhe doesn't follow vector addition toh phasor sum mein kya bolenge wo log?
Sir physics not end here it goes beyond this level, agar teacher yanhi pe reaserch ki padhai padhane lage to isi tarah har chapter me 20 tarah ke discussion badh jaayega. Aur student physicist to ban jaayega but jee aur medical clear karna difficult ho jaayega.
Sir kisi book me mentioned hai ye baatein. Plz references dijiye.
Btech mein padhate h detail mein
@@neetudhakar2797btech me Bina kitan ke padhai hoti haina bahi?
but vo dipole vala mujhe abhi bhi samjh nhi aaya ki usme 'r' ke component kyu nhi kar sakte 😭😭
Bhai log ye teacher god hai physics ke ❤
Sir is king 👑 of physics............My favourite teacher of physics ❤❤❤
Thanku sir aapake jaise teacher Mai bahut dino se khoj raha tha lekin huamare yah kuchh puchhate hai toh bolate ye exam Mai nahi aayega ya ye formula ise rat lo aur koi task de kar couriosity kill Karate hain, yahi karan hai ki Bharat me invention aur discovery dusare desh ke mukabale bahut kam hai ua engineering degree ke baad bhi bahut log unemployment hai.
Awesome ❤
Sir plz teach class 11 and class 12 physics plz in series for free
Sir apka source konsa kitab hai
Because it has no spatial direction
my teacher taught me correctly , neverthless an amazing video!
Which..?
nms sir --- goat of physics
I really love the way you explained... But I am really sorry ... I still didn't understand the reason of current being the scalar quantity. If you have to define perfectly the scalar or vector quantity how will you define ? Is the definition of b answer is wrong ? Its not about just proving others wrong but I need a solid reason to call you as right.🙏 I hope you won't take this comment to be negative.
Thank you.
Maine to sir aap hi padha hai aur sab sahi padha hai😊
This is the best series 😂❤
Sir yeh kya timepass video bna rhe ho app bht knowledgable ho aur hme kya mtlb h apka logic shi h ya hmara jee yeh sb bkwas to nhi puchhta na??? Aur hme koi physcict to bnna nhi h ,vese bhi sir apne baat ghuma phira ke sme hi khi h ,11 12 ke bacho agar starting me hi ese padhane lg jaye to ho gya beda gark .................... Pls keave all this rubish thing like roasting any random experiment and roasting any teacher 😥
sayadh tu kahin ka nahe hoga na.........
@@dibyaahwanmishra5750 ??? hath ke nakhun kat ke type kro kuchh ple nhi PD rha
Jisme physicist banne ki aukat ni h wo na dekhe ye vdo.. Click q kra be ni krta click
Sir me bhi galat bhadha tha ab to mujhe dar lag raha hai ki mere teacher ne puri physics to Galt nhi padhaya hai
king of physics