Resistors in parallel | Circuits | Physics | Khan Academy
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- Опубликовано: 23 май 2008
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Resistors that run alongside each other. Created by Sal Khan.
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the conventional way is killing this man
Appreciate video content! Apologies for the intrusion, I would love your thoughts. Have you tried - Runayslarn Survival Manifestation (google it)? It is a smashing exclusive product for discovering how to repair your electronic items without the normal expense. Ive heard some incredible things about it and my friend got cool success with it.
no man he explains nicely if you dont want to study why discourage others.
@@arnavpandey3571 true but the bsto might be dead in 2021
I can't concentrate on the video because I couldn't stop thinking about printer burps lmao
ClapBoomBoom I couldn’t concentrate due to all the high quality free porn that’s available
Many thanks Salman.... I am a veteran software engineer trying to re-learn electronics for my robotics hobby and your courses are helping a lot to refresh my memory... You are doing awesome teaching job, please keep up the excellent work, and don't let your popularity stray you into politics or some other evil thing :)
Peace!
Baris
I just published printer burps on urban dictionary.
Oh my god! 8 years ago😱
@angrinord
Based?
Jesus. . . 22years of my life. Finally electric circuits starts to make sense to me. This way of learning is way more efficient and visual than just reading textbooks
14 yrs for me.
Thanks Mr Kahn!
Fr
0:32 - printer burps!
noice
Brett Friedman nice
Thank you so much like on another level, there are concepts that you help me grasp so readily while my high school teachers only feed me formulas and expect me to know what's happening, a special thanks to your explanation of volts in another video where you explained it using the work needed to move a certain charge, this was an absolute break through for me and makes me almost excited for my up coming physics exam
I have a feeling that comments like yours are the reason he keeps working on these videos.. Thank you for being awesome :)
Wassup noe
I'm using this to study for the MCAT actually!
@PRANAV TIWARY padhle bhaii
How did it go
right when Im about to go "wait what about...." he answer my question haha awesome thanks.
Thank you so much Sal. I'm in a youth program at a college and we have a quiz on this circuit stuff tomorrow, but I haven't taken physics yet and I felt so lost. After watching these first three videos I feel like I am beyond prepared for the quiz. Thank you again
How are you doing now
Thank you! So many lectures but I couldn't grasp the idea of potential difference until I watched this. Eye opening.
Thank you Khan Academy!!! These circuit videos helped clarify things.
Thanks a lot for this, I was struggling with the concept of potential and the way capacitors/resistance affected it.
Its all soo clear now
thx for the video man, really helps me move through physics class
i realy blew a fuse when you changed to magenta.
This helped me in science! Thanks Sal.
Thanks so much! I finally understand why the voltage across each component in parallel is the same!!
I love your little humours man haha
Okay, I finally understand formula for resistors in parallel, thank you!
heh, i remember in my silly physics class running many resistors in parallel. I remember how confused I got when the voltage would eventually get really close to the voltage of the battery, and now it makes a bit more sense :p
I FINALLY UNDERSTAND THIS
This helps me alot.
thankyou salman khan.
Comfortable explaining.Thank you sir.
Wow. He just cleared up a lot
Loved the squiggly circuit!!!🤩🤩🤩😍😍😍
thankyou dude. So helpful!!
Electrons trying to reach the positive side of life? Still a better love story than Twilight.
i love you I find the textbook so hard to decipher you make it all so simple
Tjihihihihi... "Printer burps"... Tjihihi! Best part of the video! The other stuff was cool too!
Mind Blown!!!
Thank you so much! My physics teacher has been explaining this for about a month now & I finally understand :D :D :D
It is really weird to watch this then know it was published more than 8 years ago...
anyway thanks so muck Khan Academy and the one who made the video.. appreciated.
when he says positive negative it reminds me of the movie stand and deliver haha
thanks for making physics intersting...
he seems like hes ina good mood in this video.. it reflects on his audience :D
dear teacher I think conventions are made just for our comforts and they are not superior from reality if you can please live this routed conventions
I didn't quite get why the voltage drops with 16 V in this one "arm" (10:50). The voltage is 16 V and this is the sum of all the voltage- drops in each arm. So the voltage in one arm should be V1 = 16V - V2 shouldn't it?
Or is this special to this problem with parallel resistors? I feel like I didn't quite get the thing with voltage.
Voltage is the potential. When charge/ electrons are in a resistor, they basically give away energy. By impulse, friction, whatever. The potential gets lower but there still has to be some since the electrons eventually reach the + pole. Right? I see that the current drops and the resistance increases, but why exactly is it 60 volt? Why isn't it 30 since the voltage is the sum of the voltage in each arm?
Hey Sal, which direction are the electrons actually flowing? lol
Dude, your videos are a gold mine! Thank you so much. Your videos are really easy to learn from and are very interesting. Keep up the excellent work!
Where r u now
Thank you so much! I think I can pass physics now! :D
thx sir you are a life saver
Heya,
I think a good word to describe the flow of current in the conventional direction is to express it as electrons jumping through free spaces between atoms, and conventional current as being the flow of 'holes' or 'gaps'.
Thanks heaps for your work, you're going to get me through an Electrical Engineering Degree over the next 4 years.
i love you. i got into med school but now i have to pass these entry exams in physics chemistry and math. If i do pass, it'll be all thanks to you.
wish me luck!
thanks for the vid!
Thanks so much Mr khan
Thanks Khan your awesome!
Thanks for the video
seriously, the circuit at 8:00 is the most beautiful circuit i have ever seen
can you add switches? That would be awsome... good vid!
why do u not put +ve n -ve signs for ur resistances? i don't know how to choose the app sign for my resistances
thank you for posting this
you are a good person
does the voltage stay the same in a parallel circuit if i have a couple resistors do they each get whatever voltage i have.
@ 3:10 when you write the equation for the total current, i'm confused. i was wondering why its not I1=I2+I3?
Thank you very much man your videos are very much appreciated
More like Best Teacher In the World!!!
You have an equation there stating I1 = I1 + I2 so stay focused next time. Also you quite often say we "have a certain voltage here" refering to a point on the circuit but a voltage is like you said in previous videos (so I know you know that) a difference in charge between two points so a voltage can't be in a point so be accurate please. Apart from that your videos really do help intuitive understanding :) keep it up but drop the obsession with flow direction^^
"I call them printer burps" lol
@rinwhr Due to conservation laws (Kirchoff's law), the current flows in a series circuit has to be the same in all points of the circuit. Since current is basically rate of change of charge per time, it is basically the speed of electron flow. So by this definition if there is a resistor in a circuit, all electrons that are coming into it and out of it will have to slow down so that kirchoff law holds. This is only possible if there is a voltage drop across the resistor. And this is the case.
superb explanation
I know this is really off topic, but you always speak of "intuition" in your videos, which is a topic i am interested about. I'd be very interested in knowing what your understanding of intuition is and its relation to other forms of understanding. I'm going to go ahead and request a video about it too.
pls tell me how to make a circuit where switch one has to be on for switch 2 to work
when you have the circuit and it seperates into the parallel wiring. where one wire goes upwards and the other one goes downwards, then they meet up again at certain point. in 3:10 the diagram. the current seperates accordingly to how much resistance is in each wire (top and bottom) and then adds back to original current when the two wires meet up again. eg original current was 6 amps, 2 amps goes up wire one and 4 amps goes down wire 2. then when the wires meet the current becomes 6 amps again.
The good thing about these videos is when I realise my short attention span has drifted off, I can rewind the video and go back to where I was. You can't do that in a classroom.
@mexman48
Negative charge means, there are more electrons on that side of the circuit by definition as the electrons themselves are negative charged particles. So they are simply trying to move from the point they exist a lot to they exist less. This is a spontaneous process possibly due to entropy and has to obey the laws of thermodynamics. Just like a rock falls to the ground but doesn't spontaneously fly.Flying means increasing potential energy and that is not possible in a closed system.
Thx for the video. Nice and simple :). But what if the circuit would be divided in a way that only one side had a resistor like a lamp. In our textbook it said that the lamp would not light up because the current would flow through the route with no resistor. What's the logic behind this?
Brilliant.
cant wait til i get here
Hah, and now I remember the Modest Mouse song "Path of Lease Resistance" and now I know, despite (not) learning this in my physics class for weeks, that this principle is true, as electrons prefer to flow where there is least resistance, causing the 5 ohm resistor to carry more electrons so to speak as the 20 ohm resistor.
Thank you. :)
New color will be MAGENTA!
hooraaay! thank u very much , u r the best!
You are the best.
The obsession you have with the flow of current is REALLY distracting.
+Cristina p I agree, just pick a convention and stick to it.
In my knowledge, as I was taught, the conventional current is just an arbitrary decision. And even though it is not "logical" in the case of such a circuit due to the flow of electrons, different electricity circuits or batteries use protons or ions to transfer charge. Conventional Current has to do with flow of charges, not specifically electrons.
But it's important
wow thank you so much
Thanks A LOT!!!
good stuff dawg
lol this video is made when I was 7 and now that I'm 19, I'm watching this.
🤣🤣
Thanks. I'm a physics student in college who never got the textbook, and I was doing fine until we got to circuits and then I was completely lost. Now I understand.
sal so u saying that motion of electrons is in direction against current .....??
THANK YOU !, never understood how v/r + v/r is 1/r + 1/r, AWESOME!
I am still trying to understand how did he get a one as a correlation or equal to voltage, I get that it doesn't change but how does that make it 1
Hi Sir, great serie of circuit videos. Keep it up!
Where r u now my man
8:00 that is my sleep paralysis demon
XD
Is the current from negative side constant
so basically what you are saying is the electrons gotta keep moving at the same pace though the unpaved road like it wasnt there
they are from negative to positive but they are marked on as going the other way
@dalcde
Appliances are AC devices usually. The fuse is put on non-ground side of the appliance. Ground is basically a wire connected to the earth (largest sphere we can think of) The other wire (non-ground I guess, I am not sure what it is actually called) is the actual wire that carries alternative current. Flow of electrons in AC is constantly changing in a sinusodial wave from one direction to other. And this is 60Hz in US, and 50Hz in Europe, etc.
I am sure Salman has another video on AC
Ah, thanks sal for letting me pass my physics exam
Helpful still in 2019
Almost as if physics don’t change over time.
Anyone know how the current distribute in a parellel circuit?
no he makes it so simple
It might be instructive to say 'since the total resistance decreases the current increases , simply by Ohm's law written V/R=I.
Unbelievable, Sir. Great videos. Thank you
you call them printer burps? that's so adorable!!
Okay there are two paths for flow of electrons so no bumping of electrons and there repulsion so no change in voltage but when they are passing through different resistances and meeting again how will current adds up and according to Coloumbs law how voltage is directly proportional to resisitance
2:56. does he mean I3?
HAHAHAHA this dude probs finished college by now
@@hanibarnieh2789 YEP
@King David 😂😂
@mexman48
He is just telling us what the convention is, even though the charges of electrons flowing, is actually out from the negative terminal. You can maybe think of it as:
negative charges move to higher electrical potential
positive charges move to lower electrical potential
and the positive plate has higher potential so electrons move twds there. if it had been a positive charge it'll go to -ve terminal (lower potential).
Very nice
It's toooooooooooooooooooo gooooooooooood
I have something like that in my test book, but the shape is in triangles.
i love you. thank you.