Physics ki Band Bajadi hai | Why is Current a Scalar Quantity? Right Explanation by NMS Sir 

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.

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

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 🤦‍♂🤦‍♂

Ab toh mujhe lg rha h ki , ab tk Maine Puri physics he glt pdi h

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 ❤.

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.

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.

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 🙏

I don't know why he is just saying crazy things, no derivations, no proof Here are some popular physics and electronics books that support the answer: 1. "Halliday, Resnick, and Walker's Fundamentals of Physics" (10th edition) - Chapter 28: Electric Current 2. "Serway and Jewett's Physics for Scientists and Engineers" (10th edition) - Chapter 26: Electric Current and Resistance 3. "Giancoli's Physics for Scientists and Engineers" (4th edition) - Chapter 25: Electric Current and Resistance 4. "Kirkpatrick and Wheeler's Physics: A World View" (8th edition) - Chapter 24: Electric Current 5. "Nilsson and Riedel's Electric Circuits" (10th edition) - Chapter 1: Introduction to Electric Circuits In these books, you'll find that electric current is treated as a scalar quantity, with only magnitude (amperes, A) and no direction. However, the direction of current flow is often indicated in circuit diagrams and discussions. Additionally, you can also refer to: - "The Feynman Lectures on Physics" (Volume 2) by Richard Feynman - Chapter 23: Electric Current - "Electricity and Magnetism" by Edward M. Purcell - Chapter 1: Electric Current These books provide a more in-depth understanding of electric current and its behavior, reinforcing the concept of current as a scalar quantity.

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.

All those people who are making personal attacks on Sir, if you have the courage then please answer all the points made by Sir. Sir is really promoting scientific attitude, to learn ,to question❤❤❤

🌟 solution is here 🌟🫴🏼 PW batch :- lakshya 1.0 2023-2024 ( rajwant sir is right) Lakshya batch Chapter 3( current electricity) Leactue 1 Time :- 1:23:10 sir ne bataya tha. Yah ak tensor quantity hai with rank zero "0" . But aapke syllabus me nahi so ham kahenge because it follows scaler addition. Please pin me if me and teacher are correct 🙏.

Your initiatives are appreciable ! Keep up the good work 🙌🏻👍🏻

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"♥️♥️

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

RJ sir ne 2021 mei hi yeh doubt clear kr diya tha 💪

Sir arguments karne se NEET JEE clear ho jayega kya?

Thank u so much teacher...in the Era of misinformation...we have someone whom we can trust for appropriate knowledge

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.

1. Electromagnetic Theory: In Maxwell's equations, which form the foundation of classical electromagnetism, current density ( 𝐽 J) is a vector quantity because it describes the current per unit area flowing in a specific direction. However, the total current (I) is the integral of the current density over a cross-sectional area: 𝐼=∫𝐽⋅𝑑𝐴 limits A Here, the dot product 𝐽⋅𝑑𝐴 J⋅dA results in a scalar because it represents the net charge flow through the area 𝐴 A. This integral sums the contributions from all infinitesimal area elements to yield a single scalar value for current.😅

Sir aap bahut logical baat karte ho

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 ✌️

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.

DC Pandey clearly writes current as scalar quantity ❤

How can teacher understand the difference between PhD and selection level study

Goat of physics ❤

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 😥

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".

Sir, answer please.... Then , how will you prove theoretically that directions are not important for finding net current?? ( not experimentally)

Rajwant sir se padha tha 😢 NmS sir op Pr rajwant sir bhi op h

Bhai he is GOAT of physics please

Saleem sir op ❤❤❤

Physics fears everybody but NMS SIR fears physics. THE KING OF THE JUNGLE

Sir, I heard you are an IIT graduate. And you don't know vector clearly! Surprising! For school student we can define vector as quantity having magnitude, direction, & obeying vector law of addition. There are many quantities having magnitude & (sense of) direction, but not obeying vector law of addition. They are not vector at all. Please note 'obeying vector law of addition' is a necessary condition for a quantity to be a vector. Unfortunately, many (low level, non-rigorous) books do not state but tacitly assume this. For BSc student we can define vector more strictly like this: Vector is a combination of 3 quantities that transform when the coordinate axes rotate according to a definite law. Sir, please read a good book on tensor. You don't know the motivation behind the definition of vector. Once you know it, you will feel embarrassed trolling on those 98% you said wrong. You also seems not knowing the full significance of current density vector. Current density 'j' obeys vector addition law because it works for differential form, but (dc) current 'i' doesn't because it is for integral form. How!? I hope you'd enjoy thinking over this! Many errors in your conceptual understanding! I pick up only two. I ponder over why such errors! I think this is because entrance & board exam never ask deep question on concept, but only definition &/or application type questions. PS: I appreciate your attitude of 'not taking anything for granted' but deplore your trolling nature & overconfidence in your understanding.

I suddenly watched this video as I am an engineer so compelled to write about it .Current is not vector why- Because it’s derived from drifted electrons flow carrying charges per unit time like water or liquid flow .a water flow can not be termed as vector quantity it’s just like that. Don’t confuse students. Your concept is not clear first clear your concept.

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

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, ..

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.

only in hcv correct explanation is given!!! these all are lyk ...smj gye tum baki

Kya clarity h sir, hatts off

SIRJI KE HISAAAB SE SIRF INKO HI SAB PATA HAI🤡🤡🤡 JEE KE LIYE YE SAB JAAN NA ZARURI HAI KYA?

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.

Not True. Current as shown in wires and circuit has one degree of freedom as it can travels only along the length of the wire , hence scalar so direction is not important. Even in the case of Biot Savarts law the direction of velocity of electron is taken into account rather than the direction of current. Velocity is vector, Current along a wire isn't.

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

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 🙏🙏🙏🙏🙏

I am in those 2% 😅

Shiksha is ⚖️ 📐 📏 ⚖️ scalers quantity and diksha is directed so its quantity vectors which have both directed in positive direction with right ✅️ decision

आपकी विडिओ देख कर लग रहा है की शायद आप ये कहना चाह रहे है की दखो मुझे दूसरे टीचर से ज्यादा आता है , इस विडिओ मे साफ दिख रहा है की आप ही है जिसे सब आता है , ओर सब गलत है सच्चाई तो ये है की इस विडिओ मे आपने भी ठीक से नहीं बताया , किरपया एक विडिओ ओर बनाए जिस मे पूरी डीटेल मे बता रखा हो

Read it carefully before dancing for debate !!!!! If you take any reputed book then it is clear already. They don't just say only about magnitude and direction but they mention about line of support or they use the word meaningful direction. Most of the students say it doesn't follow law of vector addition ( by keeping intuition about meaningless direction ) . I respect your way of explanation but the way you are trolling other physics teacher may be a little bit polite. Yes, they shouldn't use it as a trick or tactics by dancing 😂.agree

AAPKE VIVEO "TITLE " ME SCALAR KA SPELLING GHALAT HAI 😁😁😁 Mere Kahne k baad aapne Scalar ki Spelling Sahi Ki 😂😂😂

kamal hai bhai nms sir ka

Sir famous hone ke liye simple concept ko complex mt kruye Hope u will understand 🔥♥️

Vector :- any quantity which have a value as well as useful direction.😅

Very informative video sir thank you so much ❤❤❤🎉

Abhi current electricity nhi pdha But ye smj to pura aagya sir Charan sparsh🫡😍

Writer vector nasa, u will get a nasa page which defines vector It clearly says vectors are those quantities which requires the information of direction to specify them and scalars are those which do not require information of direction to specify them Unfortunately all Indians books define it wrongly

Sir toh phir work kya vector ho gaya ??? Bcoz it has directions. But does not follow vector law of addition. Work scalar kaise h ?

Pahle vector aaya fir vector k rule aaye

Famous होने का नया तरीका।😂😂😂😂

Bhai log ye teacher god hai physics ke ❤

Ye line satik hai - Disha hone se fark nahin padta , jaroorat hai disha ki to disha upyog karte hain.

Now think about newton and Einstein, how intelligent were they use to be.😂😂

Don't distract students. What you are saying is generally taught in foundation course . Of course here , the teacher matters

Sir aisi videos banate raho , badhiya samjh aa rha hai , humko bhi or baaki NAAM ke teachero ko bhi 😂

Is bar aap rah gye... It means your JEE MAINS score is just less by 1 marks and you are failed to explain why current is scalar not vector. Prepare hoyiye fir se

Gyan Diya jhant bhar aur hungama raat bhar

Because it has no spatial direction

I think, No one should take online classes....after watching your video. Thank you.

एक अच्छा शिक्षक वो है जो सिर्फ पढ़ाता है, ना कि दूसरे टीचर्स की बुराई कर्ता है खुद को सर्वश्रेष्ठ बताता है। आप तो ऐसे बात कर रहे जैसे दुनिया में सिर्फ आप ही एकमात्र भौतिकविद हो

Sir plz teach class 11 and class 12 physics plz in series for free

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.

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..।। 🙏

Sir aap ne ghuma phira k wahi kahi jo bachche jaante hai already.

MISCONCEPTION is one of the major reason of silly mistakes.. this misconception is the most loved topic for examiner for framing questions.....

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

We are actually having misconception, we talk about the direction of the wire not the current

Sir I don't think baaki teachers ko ye sab deep baate pata bhi hai , or naa hi unhe interest hai samjhne me , unke ander subject ke liye PYAAR aapse boht kam hai , bass rank nikalne wale Qsn.s pe mastery kara denge , baaki bacche bhi phir paper nikalne ke liye padhne lagta hai slowly slowly ~ Reality 😢

Books se bas mug up Karli kuch scaler and vector quantities but kabhi uska explanation kisi ne nahi diya ya khud se jaane ki koshish hi nahi ki.

I watched this video three times and every time I neglected his overconfidence. In whole video he didn’t explain why current is scaler quantity. He wants to be over smart but ……………..😂

Phd walo ko padha rhe hai ya phir 12th, jee and neet student ko?

Inhone jo btaya ye koi badi bat nhi h but inhe lag raha h ki inhone bahut badi bat btayi h . Jese physics inhe hi aati h .

Ekdin tha jab sadhu santo ne logo ko anap sanap samjhate the or ajkal kuch teacher Hain Jo khudko bade gyani samajhte hain. You can't change physics rules according to your convenience choice.

Think of a force whose director is not important

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😊

Abe taklu we need not do phd in physics... If we learn it this detail we will never pass jee mains

Answer sahi se dijiye Sir, bahut confusion hai. Aur Aap bhi Laymen language me samjha nahi paa rahe hain,

THOSE WHO KNOW ( 2021 ) RJ SIR ❤

Is trike se too lower standards ki science books bhi galat he , unme bhot se concept he jinhe simple form me diya he to make the student understand easily 😅😅😅😅

Current vector rules ko follow nahi karti sahi to hai. Isko jabarjasti galat kyu saabit karne me lge hue ho. Ab tum condition lga do ki magnetic field ye vo dhikana falana tab to vo galat hai hi. Aise to aapki bhi boht saari baato ko kuchh condition lga ke galat sabit kar diya jayega. Jitna bhi aapne abhi gyan diya hai vo sab correct hai. But condition lga ke galat kyu thehra rahe ho dusro ko. Haa aap ye bol sakte hai ki agr hum isme ye condition lga de to ye baat galat hai. Vo aapki baat sahi hoti. Mujhe lagta hai ek din ye newton ko bhi galat sabit kar denge kuchh condition lga ke. Aapko acchi knowledge hai me maanta hu.Ye knowlesge aap 5 min me deliver kar sakte the agr idhar udhar ki baate na karte toh. Haa jaha koi teacher galat ho aap bilkul usko expose kariye. Thank you dear sir 🙏🏻🙏🏻 and love you ❤❤

Rajwant sir kab ka bataya tha ❤

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

I know current is tensor quantity but I was told in BTech 3rd year ....nothing earthquake I felt when I didn't know during my jee preparation....koi phad nhi toot pdeyga....ye jaaney sey ki tensor quantity sey.....even... line man don't know nothing about transformer still he can maintain better then engineer...so knowing fancy terminology doesn't make much difference 😕😕

king of physics

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)

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 ?

Sir, you are the greatest physics teacher of India.

Beta tension mat lo Tumko jab teacher banana ho to ye sab detail me padna Abi exam clear karna h to it’s enough that current is scaler. In sab chakkar me mat pado Otherwise ese gyan tumko bahot milenge Aur completion rah jayga😊

HC verma sir cleared this confusion a long time ago

Not agree with you a lot...but current is scalar and its direction is direction of velocity positive charge particles

my teacher taught me correctly , neverthless an amazing video!