Thanks Mahesh for this great video which clears an ambiguous issue on the topic of what current actually is. I was unaware of this question until I opened physics textbooks in English, since French textbooks and teachers have always assumed current is a scalar whose sign is only conventional. i.e. for any given section, you can choose arbitrarily to count as positive current going from left to right or from right to left. At university level, current is defined as the flux of the current density vector across a given section: a sum of infinitesimal *scalar* products in itself. It proves your point even more :))
Thank you Mahesh. Your videos make me fall in love with physics again. I have a small confusion: In case of AC circuits, we consider currents as vector right ? Can you please explain graphically the case of AC ?
I am not sure what you have in mind, so I'll give two answers. 1. Current is always a scalar quantity, including in AC. It just depends on the instant you measure it, and it usually alternates between positive and negative values. This does not make it a vector quantity. 2. In AC circuits containing capacitors and coils, this holds too, but adding sine functions out of phase with each other (be it currents or voltages) can require mathematical tricks, such as *representing* the current/voltage as a rotating vector. BUT is it only a nice way to add sine functions using a 2D representation instead of using complicated trigonometry.
2:07,sir,I have a doubt here,why will the 3c of charge will only go forward?should not some coulomb,let's suppose 1 coulomb of charge should go to the wire from which the 4c of charge is coming?and similarly,should some amount of charge coming from 4c of charge carrying wire go to the wire containing 3 c of charge? please help sir?
#doubt #maheshsirop Sir exactly what we are telling { f(x) =x²+2 in diffrenation . My sir just told me it shows dependence. But how exactly and what is it?? Can you take this doubt sir?
So you are saying the direction of current shown in the circuit diagram is the velocity direction of electrons (charges)? which means electrons are moving in the direction of the positive terminal to the negative terminal of the cell/battery/source because the current direction is always shown +ve to -ve of the cell. Hence your statement makes no sense. Explain this one.
He meant that the direction of the electric current is the direction of movement (imaginary velocity vector) of 'charges (protons)' :) It gets complicated with what language offers us. He didn't say "electrons" anywhere. (Atleast I didn't hear him saying that) What he meant instead, was that what we refer to as the direction of electric curent is not actually the direction of the electric current (since it's just a count of charge), but the direction of movement of charge (protons)
@@UDHAV79 you mean he didn't say "electrons" right? then what is electric current? explain to me and you explicitly mentioned moving charges as "protons" right? do you know where they exist? and also you mentioned the movement of protons, which means these protons move inside the conductor and these are the producing current. Are you really studied well electric current?
@@vijaypawar1316 Electric current refers to the 'amount of charge' that flows through the cross sectional area of a wire per unit time. Although, electric current is produced by electrons, as a convention, we define the so-called direction of electric current/direction of charge as the imaginary movent of protons/the direction, opposite to the direction of flow of elctrons. I used the word "imaginary" in my previous comment to stress on this fact but you seemed to misunderstand. Anyway, I hope that this clarifies the misunderstanding. Great day!
@@UDHAV79 thank you, friend. Yes, the flow of charge is current but in this video, the charges are electrons only, not protons. Yes, protons are also charged particles but they do not contribute any current in this concept of current. Any nuclear particles (protons and neutrons) do not stand stable outside the nucleus and they interact with other atoms nucleus hence there is no point of proton here. And sorry for spoiling the weekend evening. have a great day.
Thanks Mahesh for this great video which clears an ambiguous issue on the topic of what current actually is. I was unaware of this question until I opened physics textbooks in English, since French textbooks and teachers have always assumed current is a scalar whose sign is only conventional. i.e. for any given section, you can choose arbitrarily to count as positive current going from left to right or from right to left.
At university level, current is defined as the flux of the current density vector across a given section: a sum of infinitesimal *scalar* products in itself. It proves your point even more :))
3:11
I couldn't stop laughing
Lit 😂 🔥🔥
Wonderful enjoyment sir
Thank you 🥰🥰
Mind blowing
Thank you Mahesh. Your videos make me fall in love with physics again. I have a small confusion: In case of AC circuits, we consider currents as vector right ? Can you please explain graphically the case of AC ?
I am not sure what you have in mind, so I'll give two answers.
1. Current is always a scalar quantity, including in AC. It just depends on the instant you measure it, and it usually alternates between positive and negative values. This does not make it a vector quantity.
2. In AC circuits containing capacitors and coils, this holds too, but adding sine functions out of phase with each other (be it currents or voltages) can require mathematical tricks, such as *representing* the current/voltage as a rotating vector. BUT is it only a nice way to add sine functions using a 2D representation instead of using complicated trigonometry.
2:07,sir,I have a doubt here,why will the 3c of charge will only go forward?should not some coulomb,let's suppose 1 coulomb of charge should go to the wire from which the 4c of charge is coming?and similarly,should some amount of charge coming from 4c of charge carrying wire go to the wire containing 3 c of charge? please help sir?
Fav part - long story short 😍
Wow! I found a great way to get my mind busted in seconds 😃👍
Awesome sir
Thanks
5:57 10m to the right is displacement, which is a vector??
Will I be right to call the velocity vector the voltage?
But sir i have question please answer
AC circuits or circuits with inductors and capacitors follows the law of vector addition why and how ?
Sir we want more classes regarding different topics
Mind boggling!!
Hi sir , can you please explain divergence ?
then why current density is vector?
#doubt #maheshsirop
Sir exactly what we are telling { f(x) =x²+2 in diffrenation .
My sir just told me it shows dependence.
But how exactly and what is it??
Can you take this doubt sir?
Can someone explain me in simple words why stress is rank 2 tensor
But a zero vector has infinite directions ...so can it be a tensor of rank infinity
Thank you sir. Sir r u a bengali?
Nope! Why do you ask?
So you are saying the direction of current shown in the circuit diagram is the velocity direction of electrons (charges)? which means electrons are moving in the direction of the positive terminal to the negative terminal of the cell/battery/source because the current direction is always shown +ve to -ve of the cell. Hence your statement makes no sense. Explain this one.
He meant that the direction of the electric current is the direction of movement (imaginary velocity vector) of 'charges (protons)' :)
It gets complicated with what language offers us. He didn't say "electrons" anywhere. (Atleast I didn't hear him saying that) What he meant instead, was that what we refer to as the direction of electric curent is not actually the direction of the electric current (since it's just a count of charge), but the direction of movement of charge (protons)
@@UDHAV79 you mean he didn't say "electrons" right? then what is electric current? explain to me and you explicitly mentioned moving charges as "protons" right? do you know where they exist? and also you mentioned the movement of protons, which means these protons move inside the conductor and these are the producing current. Are you really studied well electric current?
@@vijaypawar1316 Electric current refers to the 'amount of charge' that flows through the cross sectional area of a wire per unit time. Although, electric current is produced by electrons, as a convention, we define the so-called direction of electric current/direction of charge as the imaginary movent of protons/the direction, opposite to the direction of flow of elctrons. I used the word "imaginary" in my previous comment to stress on this fact but you seemed to misunderstand. Anyway, I hope that this clarifies the misunderstanding. Great day!
@@UDHAV79 thank you, friend. Yes, the flow of charge is current but in this video, the charges are electrons only, not protons. Yes, protons are also charged particles but they do not contribute any current in this concept of current. Any nuclear particles (protons and neutrons) do not stand stable outside the nucleus and they interact with other atoms nucleus hence there is no point of proton here. And sorry for spoiling the weekend evening. have a great day.
Ngl the two guys pulling the block look like Goku and Vegeta then the third one has ssj3
Yes!!
@@Mahesh_Shenoy and the video was great helped a lot
Wait wait, you are same narrator that narrate in Indian Khan academy
Goku normal, super saiyan , super saiyan 2 , super saiyan 3
Vsauce
Veritasium (negative mass.. or was it action lab?..)..
🤣🤣
😂
Dude looks like that guy from key and peele
Current in a wire is one dimensional vector.
So basically Kirchoff's first law tells why current is scalar
current is a phaser