our professor spend 1 hour explaining this thing and drawing every where and i've just understand a little bit, here i understand most of it, thanks for that Mr.Willy
Basically the failure of traditional academic setup. It happens worldwide. We learn till this day so far because we strive for understanding and not high scores. Traditional setup aims for the other way around.
Thank you so much your videos helped me so much to better understand physics better than my own teachers I’m from Tunisia and it s in a mess right now so thank you very much I m very grateful!!!🙏
I'm confused by the all circuits going in and out concept. In a circuit, the negative value would just represent the direction of current flow, which should be away from the node. Sending any current toward the node with no exit would just change the electrical energy into thermal energy wouldn't it? I realize it was just a visual example, but wouldn't it have been just as accurate and more realistic to show the negative flowing out? 3A positive going in and 3A negative going out would still fit KCL as the sum would be 3 + -3 = 0. I'm learning, don't judge me!!
KIRCHHOFF: the english word "church" is related to the german word "kirche"; the german word "hof" can be translated by the word "yard"; in the old days grounds around churches were used to bury people; so, a good translation of "kirchhoff" is "graveyard".
Thankyou so much I have been researching for half hour wondering "Do I actually understand?" So I thought I think I do, I thought it's basically common sense basic math but I needed to make sure I pass so I kept studying and now thanks to you this will be the last video I need
yes, unfortunately, and if the lecturer is untidy, it looks like an ell. I was trained in capital I and square resistors, and I miss the neatness that resulted
this isn't true as ideally we take connecting wires in consideration these wires nor have any resistance nor these resistors take up any energy these thing come up if u take electrical engineering
@khan academy Does Kirchhoffs Current Law also apply to constant current sources? Let's say i have a parallel circuit with each branch has a resistor1 and resistor2. A constant current source should supply and hold the written constant current on each branches. Can someone help me with that? Thanks! :)
Direction of electron flow. An answer on StackExchange put it well -- "If your power supply is sourcing a positive current toward the ground, that corresponds to a flow of positive charge from the supply to ground. This is equivalent to a flow of negative charge from the ground to the power supply. In a real wire, only negative charges can flow, so the second thing will happen: electrons (which have a negative charge) will flow from the ground to the source." physics.stackexchange.com/questions/208926/whats-the-difference-between-a-positive-and-a-negative-current
+Crossfire Memer Actually, this is incorrect. Current is the measure of the number of electrons (measured in Coulombs) that passes across a surface in one second. The unit is Ampere, which is 1 Coulomb per second (or 1.6 x 10^19 electrons per second). So, current represents the flow of electrons, not the number of electrons. A measurement of the number of electrons is referred to as "charge," represented by a capital Q, and the unit of measurement is Coulombs. For more info, refer to the Wikipedia articles for Current, Charge, Ampere, and Coulomb.
our professor spend 1 hour explaining this thing and drawing every where and i've just understand a little bit, here i understand most of it, thanks for that Mr.Willy
Yes, because your professor taught it before
@@sauvejean-luc3814 No
Basically the failure of traditional academic setup. It happens worldwide. We learn till this day so far because we strive for understanding and not high scores. Traditional setup aims for the other way around.
😂😂😂
wait a minute, if this is his current law, what was his previous law????!!!
This joke is so bad that its good. lmao
wahay
took me a bit too long to understand what you meant.......
I can't believe you done this
Haa 🤣🗣️🤣... Funny guy
i got 92% in my physics test thanks=A
SANA ALL
Flex💪
@@andriekeoghan2721 tol alam mo paano mag solve?
I have learnt more from watching this short video than reading all my textbooks and classes I have attended. Thanks
NOW YOU COME OUT WITH THIS???? MY FINAL WAS A WEEK AGO! jk ily
orivalx
View vi x
Thank you so much your videos helped me so much to better understand physics better than my own teachers I’m from Tunisia and it s in a mess right now so thank you very much I m very grateful!!!🙏
I'm confused by the all circuits going in and out concept. In a circuit, the negative value would just represent the direction of current flow, which should be away from the node. Sending any current toward the node with no exit would just change the electrical energy into thermal energy wouldn't it? I realize it was just a visual example, but wouldn't it have been just as accurate and more realistic to show the negative flowing out? 3A positive going in and 3A negative going out would still fit KCL as the sum would be 3 + -3 = 0.
I'm learning, don't judge me!!
KIRCHHOFF: the english word "church" is related to the german word "kirche"; the german word "hof" can be translated by the word "yard"; in the old days grounds around churches were used to bury people; so, a good translation of "kirchhoff" is "graveyard".
Except Kirchhoff is a name and it says "hoff" not "hof"-
😂😂😂
khan academy's biology explanation is better than physics' explanation
Well physics is harder than biology to be fair
Thanks. U the only one who makes sense
If that's Kirchhoff's Current Law, what was Kirchhoff's Old Law?
..it was his _previous_ law.
amazing one.. respect for you
Thankyou so much I have been researching for half hour wondering "Do I actually understand?" So I thought I think I do, I thought it's basically common sense basic math but I needed to make sure I pass so I kept studying and now thanks to you this will be the last video I need
Very good explanation. Well done. Thank you for this wonderful video.
Nice vid bro!
Thank you for this explanation
Thank you so much this videos are useful to us to read thank you khan academy
THANKS FOR THIS.
thankyou!❤
Very informative lecture. Kudos.
Thanks for this, clear, concise and just nice > Mahalo...
At 4:00 all currents are going in.
It would be useful to show how you made the current negative.. by adding a source perhaps? just guessing...
Ty It helped I remember now it was the sum sign threw me off ty
kirkkohff's law ?????? isn't it kirchhoff's law ? its in the title jk thx for the help bro
Awesome video!!! Saved me on my test!!!
This is a consequence of the law of conservation of charge
Cro cop's law= Right leg hospital left leg cemetery
Great! 😊
This is way too complicated. My momma taught me the simple way: Gzintas = Gzoutas. Translation: What Goes Into must Go Out Of.
thats literally what his main point is though
Mah momma told me to not listen to strangers on them internets.
Have a midterm in 2 hours. Of course khan academy has a video on this lol
I wrote it.
thank you
Anyone remember when 95 was minimally an A minus?
Thank you for sharing! :-D Your videos are always great.
Great understanding
Thank you..it was very helpful 😊
Hi cant you help me idont understand
hey , love your videos
I thought if a current is going out that is negative? I am referring to the 5:02
This guy sounds so much like bill Murray or bill Paxton that it's distracting
Well yeah, now that I read your comment I can't unhear Bill Murray 😂
make a video about wheatstone bridge please
I've never seen small i for current. Is that acceptable at University level?
yes, unfortunately, and if the lecturer is untidy, it looks like an ell. I was trained in capital I and square resistors, and I miss the neatness that resulted
can I download them from somewhere please? 😃
kishan chauhan just go to a website where u can download RUclips videos then copy this video link and paste it there then download it. Done ☺🤘
Download their app dude.
Sir i hav a doubt how would current be negative ? It that practically possible?
-ve current means it is going in the opposite direction of what was initially assumed.
What if half of the wires are in and the half are out?
how is the current the same, wouldnt the resistors convert the electricity into heat?
Yes but, current is only a part of the electricity. The part that doesn't change.
this isn't true as ideally we take connecting wires in consideration these wires nor have any resistance nor these resistors take up any energy these thing come up if u take electrical engineering
darkls14 ur confusing voltage and current bro
ok
@khan academy
Does Kirchhoffs Current Law also apply to constant current sources?
Let's say i have a parallel circuit with each branch has a resistor1 and resistor2.
A constant current source should supply and hold the written constant current on each branches.
Can someone help me with that?
Thanks! :)
it is not enough
I don't understand, what's a negative current?
Just a current flowing in the opposite direction
who can spell his name ?
sone topics in your videos are missing like..
wheatstone bridge ..
biot savarts law.. nd some more
So amps can be negative numbers??
Yes it can be negative
Yeah, it just means battery is switched the other way. Nothing too obscure
what is the difference between +3A and -3A?
Direction of electron flow. An answer on StackExchange put it well -- "If your power supply is sourcing a positive current toward the ground, that corresponds to a flow of positive charge from the supply to ground. This is equivalent to a flow of negative charge from the ground to the power supply. In a real wire, only negative charges can flow, so the second thing will happen: electrons (which have a negative charge) will flow from the ground to the source." physics.stackexchange.com/questions/208926/whats-the-difference-between-a-positive-and-a-negative-current
The supply has the negative current and the load has positive.
I love you
I hope to transulat that into arabic
i dont get irt
salman khan
not that intuitive like how David used to explain
lol 1 day too late, had test td... haha
just remember guys that current represents the NUMBER of electrons
+Crossfire Memer isn't it usually in coulombs?
+Jimbo Green coulombs are the number of electrons multiplied by a constant e(1.6x10^-19 coulombs)
Crossfire Memer but there's usually lots of electrons in a current so it's measured in coulombs rather than individual electrons
+Jimbo Green well, technically coulombs are the number of electrons CARRYING the charge, so both of them are basically the same
+Crossfire Memer Actually, this is incorrect. Current is the measure of the number of electrons (measured in Coulombs) that passes across a surface in one second. The unit is Ampere, which is 1 Coulomb per second (or 1.6 x 10^19 electrons per second). So, current represents the flow of electrons, not the number of electrons. A measurement of the number of electrons is referred to as "charge," represented by a capital Q, and the unit of measurement is Coulombs. For more info, refer to the Wikipedia articles for Current, Charge, Ampere, and Coulomb.
omg bloody khan just change the arrows to a different direction dont put -ve u complicate me
This made literally zero sense(except for the ohms law part). Thanks for trying tho.
You pump water into something, it has to go out somewhere. As easy as it gets.
first
can this old man turn on sensitive on his mic!
Seek Christ Jesus YHVH God the Almighty
Yeah
But this is a physics lecture
Lazy instructor.....no specific example
Thank you