YOU ARE A GODSEND AND I LOVE YOU. I have been spending weeks learning this, and today, the day before the exam, I finally understand RC circuits. Thank you!
brother at 1:45 u said current is running through those two capacitors where as u should say across the parallel branch........ well your video helped me a lot. thanks .keep it up.
Because after the circuit have been running for a long time the the capacitors are charged and no current flows through them. Therefore, the two resistors are in series and have the same current flowing through them. Does that help?
Because when the capacitors are fully charged no current flows through that branch, but the current still flows around the outer branch through the resistors and then they are in series. Does that help?
The capacitors do not separate the resistors. Once the capacitors are fully charged, the current continues to flow through the resistors and the current through each resistor will be the same. Therefore the resistors are in series. Does that help?
You said in your last video that at t equals infinity the current is equal to zero. In this video you state that we will be assuming that t is equal to zero but then you go on to find current through the R is .2A. I do not understand why I is is not zero.
In the first video there is resistor and capacitor in series, after a long time (5 time constant) the the current has been reduced to zero. In this video there is a branch with just a resistor, when the switch is closed the current through the resistor goes to its max right a way and stays there. Does that help? You can see a listing of all my vidoes at www.stepbystepscience.com
Why are the 10 and 20 resistors in series if theres another place the current can go? Does it only matter if the current has a choice between 2 or more resistors? I guess its still in series even though it could go to the capaciTORs
+matt munoz Yes you are right, it should be 4 microfarads. Thnaks for noticing and letting me know! You can link to all my videos at my website: www.stepbystepscience.com
This video was incredibly helpful! I am tutoring for physics today and watching your videos was very useful for brushing up on subjects I have not reviewed in nearly a year. Thank you for creating them!
after long time the current in the circuit drops to zero. As result the pd across the 10 ohms resistor drops also to zero which means at the end the 2 capacitors are sharing between themselves all of the 6V of the battery. Vxy = 6V in Q4.
Wow! Really excellent explanation and presentation video, sound, all. Thank you very much. I just found your channel when searching for RC circuit analysis. And what a wealth of information I found. I subscribed right away and will be viewing all that you have presented.
If we calculate this after a long time, then like the previous example shouldn't the current through the 10 ohms be zero? Like if the capacitors are fully charged and the source ran out of power? Then the only source is the equivalent capacitors. why isn't it like that?
My argument here is that, based on my past experiences with circuit analysis, both resistors are not in series (nor parallel). I have been taught that, when there are circuit elements connected between two resistors, they fundamentally cannot be called in series (reference node X and the elements, the 2 capacitors, below it). Since the assumption here states that, in this case, the capacitors are fully charged, would this be an exception? With both capacitors fully charged on the middle wire, can we then say that the 2 resistors are in fact in series? Also, what if the capacitor(s) where not charge, could we still say that the resistors are in series?
When calculating for volts across caps don't write down the pico and micro sign like i did reading off my calculator, just the V for volts, lol. Preciate the tutorial.
but in the last video you described that at t=0 Vr=I*R, Vc=0 as C has no charge and at t=infinity Vr=0,Vc=Q/C as I through resistor is 0.. i am confused now
Kinda late but for new people watching this video, there's an I (current) at infinity because there's a new branch for the current to go through (ie the parallel resistor to the capacitor)
but i have a question , in the firrst you assume that the voltage between 10 resistor in 6 and calculate the current then u said that the voltage around the 10 resistor is 2 ,!!!
Could you explain why the lower value capacitor stores more voltage than the 12uf if the charge is the same. Is it due to different internal resistances?
How can the current at time = infinite be the same as the current if there are no capacitors in the circuit? Don't the two capacitors store some of the total charge/current in the circuit?
For question 4 I'm confused. I was able to follow everything up until you said the charge on both capacitors has to be the same since they are in a series. Why is that? I would think the the capacitor with the higher capacitance would hold more charge.
Thank you very much for very nice presentation of RC circuit analysis, Can you tell me what program you used for presentation of this video, is it microsoft Power Point?
Thank you, simple and awesome.. very clean and clear.. A quick question, when your explaining solution for 4th question, the unit of the capacitor is 4uF not 4uC right ??
what if there is a resistor between cap 1 and cap 2 are they still treated a "resistors in parallel"
3 ปีที่แล้ว
Feedback: Your teaching would benefit if you stopped saying filler words like "alright" and such all the time. Give the student time to think about what is said with a short pause instead of interrupting their thoughts with fillers.
It's like two voltage dividers... The capacitors in the middle because they're in series reduces the voltage from the voltage divider of the two resistors.
What would happen if your 10 Ohm resistor was a capacitor. If there was no 20 Ohm resistor, you are just going to charge the capacitors. If the 20 Ohms are there however, would you be charging the capacitors with less current? Under normal circumstances, if the 10 Ohm was replaced with a capacitor, they would be in series and all capacitors will have the same charge. However, I am not sure what will happen if the 20 Ohm is connected in parallel to the 12 uF and the 6 uF. Would it be preventing them to get the same charge as the capacitor which we used to replace the 10 Ohm resistor?
Hi There, At time-stamp 1:43 Your last statement is: Two things - capacitors are charged and current is running through those two capacitors... Most likely you wanted to say: capacitors are charged and current is running through those two RESISTORS... ;-) Your tutorials are great!!! I LOVE them... I am going over them and taking notes... I have become so good I even started catching the MASTER's miss-spells... ;-) I am sure you meant Resistors... Like in the prior video you said 25 amps instead of 20 amps... It's OK to make a mistake with so much numbers in ones head!!! Cheers
When a capacitor is charged through a DC supply source for infinite time, the final current through it is - (a) Determined by the resistor (b) Half of the initial current (c) Infinite (d) Zero. please reply of this answer sir please 😓
Sir your videos are nice. I want your videos to be shared with everyone. Write long description in your TH-cam description title before uploading. It will help people to finding your videos, this is how TH-cam search algorithm works. Salam from Pakistan.
only when the resistor is placed among the same branch(or in series) with the capacitors. that's why he kept saying outer branch(the one in parallel with the capacitors, which is the 10ohm and 20ohm resistors).
I really appreciate your video, well explained and very useful. I have a question: Mounting a timer with a 555 I need to know "when" the capacitor is going to arrive to 1/3 and 2/3 of the total voltage. Let's say I have a 9v rail voltage and I want to know how long is going to take for the capacitor to arrive to that voltage with a resistor on serie. I can't find an easy way to do It. Could you help? Thanks anyway and really god Job. Carlos
This is such an informative and great video for the basic understanding of RC circuits. Despite the people complaining that you pronounce capacitor differently, it didn't impede my understanding at all. Great job!!!! You teach better than some college professors :)
Thanks for taking the time to write such a nice comment. Glad that you find the videos helpful. You can also see a listing of all my videos by topic at www.stepbystepscience.com
I have a question from the very end of this video.......Shouldn'd the voltage across the 6uF be 4 and 12uF be 2................and together should'nt they be 6 ohms alltogether????
hey man ur doing a really great job. i wish i could give u a 1000 likes on my own. all of ur videos especially 3 and 4 are really really helpful. please do more videos on RL and RLC circuits
That is the goal, break everything into manageable pieces. Thank you very much for the comment. You can see a listing of all my videos at my website, www.stepbystepscience.com
You seem very intelligent, so I want to ask you a bunch of questions I've been saving up when studying circuitry. It's a bombardment of questions, though, so you don't need to answer if you don't have the time. I'm taking physics in school so these questions will help me. -why do you not short circuit a battery by touching both ends with your finers? is skin's resistance so high that it essentially breaks the circuit? -what causes death? Voltage or current? -how can birds sit on power lines? -if a capacitor is 10 microfarads, in an RC circuit, then at t=c, where c is a random constant, the capacitor can hold the maximum charge of a 5 microfarad capacitor, maybe later the max charge for a 6 microfarad capacitor, maybe earlier the maximum charge of a 3 microfarad capacitor? -why does a circuit complete itself if you are standing on the ground and you touch a charged conductor that's connected to a battery or transformer on the ground? -is a battery connected to ground if its physically touching the ground or does it need to connect itself to a long metal pipe in the ground? -does voltage come out of the negative or positive side of a battery? -why does emf exist? Why is it important in circuitry?
-how does a capacitor charge if it's not a circuit? -why must a circuit connect back onto itself? I understand its necessary to have a complete circuit oelectrons can flow, but why? -if you have high voltage in a wire, why doesnt a spark form in between a switch? -if a high capacitance capacitor is fully charged, why doesn't a spark form in between? -Why are wires covered in conductors? -what's so good about coaxial cables? -if a resistor has a really high resistance, is it possible to effectively cut off the current, thus breaking the circuit? -is a lightbulb flickering really quickly? I think the answer is no but I dont know. -imagine two circuits each with a battery with potential V. In both circuits there is one resistor. In the fist circuit, the resistor is 1 ohm. In the second circuit, the resistor is 10000 ohms. Which circuit depletes the battery faster? -what happens if a battery is fully charged and you try to charge it even more (i understand this question might have more to do with chemistry than physics) -How does grounding work? Why is it important? -what is bemf?
YOU ARE A GODSEND AND I LOVE YOU. I have been spending weeks learning this, and today, the day before the exam, I finally understand RC circuits. Thank you!
Thank you ver much for the great comment. Great that you found the videos helpful.
10 years later and this dude is still the G.O.A.T.
So nice of you, thanks!!
I’m really enjoying learning from you, perfect 🥺🦋💕
Awesome! Thank you!
brother at 1:45 u said current is running through those two capacitors where as u should say across the parallel branch........ well your video helped me a lot. thanks .keep it up.
Got it, thanks.
in question 2 how is the current through both resistors the same? The current through the capacitors is 0?
Because after the circuit have been running for a long time the the capacitors are charged and no current flows through them. Therefore, the two resistors are in series and have the same current flowing through them. Does that help?
very good video, well explained...
Thank you
How come the resistors are in series?
Because when the capacitors are fully charged no current flows through that branch, but the current still flows around the outer branch through the resistors and then they are in series. Does that help?
good job. Well explained
Thank you for the positive comment.
I'm a little confused. How can the resistors be considered in series when the capacitors separate them?
The capacitors do not separate the resistors. Once the capacitors are fully charged, the current continues to flow through the resistors and the current through each resistor will be the same. Therefore the resistors are in series. Does that help?
@@stepbystepscience Yes, that makes sense thanks!
I appreciate how you divide the problem up into parts that can act as a checklist to complete the analysis. thank you!
Velocity 😁😁😁 it happens when u have more concepts in mind. Cheers
Thanks for the comment.
ikr!
im a little confused on the potential difference isnt the total supposed to be 6? yet the 20ohm resistance is 4V and so is the 2 C branch
It is 4 V across both branches because 2 of the volts are used by the 10 Ohm resistor.
Thanks. Just a detail, at 2:44 the dimension of your inverse capacitance is 1/uF and not uF.
You said in your last video that at t equals infinity the current is equal to zero. In this video you state that we will be assuming that t is equal to zero but then you go on to find current through the R is .2A. I do not understand why I is is not zero.
In the first video there is resistor and capacitor in series, after a long time (5 time constant) the the current has been reduced to zero. In this video there is a branch with just a resistor, when the switch is closed the current through the resistor goes to its max right a way and stays there. Does that help? You can see a listing of all my vidoes at www.stepbystepscience.com
So it is because of the branch with the lone resistor that the current is maintained?
+Andrew Mitchell yes
Why are the 10 and 20 resistors in series if theres another place the current can go? Does it only matter if the current has a choice between 2 or more resistors? I guess its still in series even though it could go to the capaciTORs
The breakdown and the way you make me think of these topics have been more helpful than reading textbook! Thank you!!
Glad it was helpful!
at 8:21, you mean 4 micro farods x 4 volts, right???
Also thanks so much for this video, I hate RC circuits and this made sense.
+matt munoz Yes you are right, it should be 4 microfarads. Thnaks for noticing and letting me know!
You can link to all my videos at my website: www.stepbystepscience.com
Thanks sir it's very helpful for my IIT JEE exam . Again thank you so much sir ...🙏🙏🙏
You're very welcome. All the best!
This video was incredibly helpful! I am tutoring for physics today and watching your videos was very useful for brushing up on subjects I have not reviewed in nearly a year. Thank you for creating them!
Nice explained ...but there is in question 3 solution ..q=c*v. q=4µF*4V and not q=4µC*4V
yeah, thought something was off :|
the video was very good but only problem for me was the style of speaking but captions resolved it
Thanks.
after long time the current in the circuit drops to zero. As result the pd across the 10 ohms resistor drops also to zero which means at the end the 2 capacitors are sharing between themselves all of the 6V of the battery. Vxy = 6V in Q4.
This is awesome thank you I was not understanding this in my class but now ive got a much better grasp on it.
Great, thanks for the comment.
Wow! Really excellent explanation and presentation video, sound, all. Thank you very much. I just found your channel when searching for RC circuit analysis. And what a wealth of information I found. I subscribed right away and will be viewing all that you have presented.
Thank you for doing all of that.
nicely explained...you start right from the basics and thats the best part....all the gaps fill up...thanx a ton!
You are very welcome. Thanks for watching and commenting.
If we calculate this after a long time, then like the previous example shouldn't the current through the 10 ohms be zero? Like if the capacitors are fully charged and the source ran out of power? Then the only source is the equivalent capacitors. why isn't it like that?
Thanks for the video,and please upload more videos!!
There are more to come!
My argument here is that, based on my past experiences with circuit analysis, both resistors are not in series (nor parallel). I have been taught that, when there are circuit elements connected between two resistors, they fundamentally cannot be called in series (reference node X and the elements, the 2 capacitors, below it). Since the assumption here states that, in this case, the capacitors are fully charged, would this be an exception? With both capacitors fully charged on the middle wire, can we then say that the 2 resistors are in fact in series? Also, what if the capacitor(s) where not charge, could we still say that the resistors are in series?
7:58 how do we say voltage is 4v isnt it 6v? Can you explain😅
Good question, but no, it is 4 V because 2 V get used bay the 10 ohm resistor....right.
@@stepbystepscience ohh.. I got it now Thank you so much sir☺
When calculating for volts across caps don't write down the pico and micro sign like i did reading off my calculator, just the V for volts, lol. Preciate the tutorial.
I am very new to this topic.. i found this video is very helpfull for me to understand RC Circuits in a very very basic version
Kiran N T Great that is exactly what it is supposed to be.
Thank you very much for this video unbale to find better video then this so simple easy to understand thanks
Im Turkish ı understood every word u told its very clear expression thank u
Great, thank you very much for watching and commenting.
but in the last video you described that at t=0
Vr=I*R, Vc=0 as C has no charge
and at t=infinity
Vr=0,Vc=Q/C as I through resistor is 0..
i am confused now
Kinda late but for new people watching this video, there's an I (current) at infinity because there's a new branch for the current to go through (ie the parallel resistor to the capacitor)
@@mrthatcher8562 Thanks, your response really helped me understand :)
but i have a question , in the firrst you assume that the voltage between 10 resistor in 6 and calculate the current then u said that the voltage around the 10 resistor is 2 ,!!!
Could you explain why the lower value capacitor stores more voltage than the 12uf if the charge is the same. Is it due to different internal resistances?
How can the current at time = infinite be the same as the current if there are no capacitors in the circuit? Don't the two capacitors store some of the total charge/current in the circuit?
For question 4 I'm confused. I was able to follow everything up until you said the charge on both capacitors has to be the same since they are in a series. Why is that? I would think the the capacitor with the higher capacitance would hold more charge.
For capacitors in series the charge is the same. This video explains it:
th-cam.com/video/EMdpkDoMXXE/w-d-xo.html
Thank you so much
It helped me a lot......
Thank you very much for very nice presentation of RC circuit analysis, Can you tell me what program you used for presentation of this video, is it microsoft Power Point?
123kkambiz Thank you for the positive comment. The presentation is made with Keynote from Apple.
Brian Swarthout Thanks again.
Nice video the first was nice and this one is even better now see ya on the third one
In point x the current will split into two current so current in 10 ohm and 20 ohm not the same?
Thank you, simple and awesome.. very clean and clear..
A quick question, when your explaining solution for 4th question, the unit of the capacitor is 4uF not 4uC right ??
what if there is a resistor between cap 1 and cap 2 are they still treated a "resistors in parallel"
Feedback: Your teaching would benefit if you stopped saying filler words like "alright" and such all the time. Give the student time to think about what is said with a short pause instead of interrupting their thoughts with fillers.
Alright, haha
Well explained
Right bro
Sir Great , helpful. And .....nice apprauch. ...👍 I have sent my regards from Bahrain ...
Awesome, thank you so much for watching and commenting!
It's like two voltage dividers... The capacitors in the middle because they're in series reduces the voltage from the voltage divider of the two resistors.
Thank you
You're welcome
Very good. Congratulations!
Thank you very much!
Best one to explain electric physics
Thanks so much!
To find at t 0 or infinity V or current is easy difficulty is finding them as a function of t
What would happen if your 10 Ohm resistor was a capacitor. If there was no 20 Ohm resistor, you are just going to charge the capacitors. If the 20 Ohms are there however, would you be charging the capacitors with less current? Under normal circumstances, if the 10 Ohm was replaced with a capacitor, they would be in series and all capacitors will have the same charge. However, I am not sure what will happen if the 20 Ohm is connected in parallel to the 12 uF and the 6 uF. Would it be preventing them to get the same charge as the capacitor which we used to replace the 10 Ohm resistor?
Hi There,
At time-stamp 1:43 Your last statement is: Two things - capacitors are charged and current is running through those two capacitors... Most likely you wanted to say: capacitors are charged and current is running through those two RESISTORS...
;-)
Your tutorials are great!!! I LOVE them...
I am going over them and taking notes...
I have become so good I even started catching the MASTER's miss-spells... ;-)
I am sure you meant Resistors... Like in the prior video you said 25 amps instead of 20 amps...
It's OK to make a mistake with so much numbers in ones head!!!
Cheers
When a capacitor is charged through a DC supply source for infinite time, the final current through it is -
(a) Determined by the resistor
(b) Half of the initial current
(c) Infinite
(d) Zero. please reply of this answer sir please 😓
Excellent explanation, Thank you very much
Awesome!
Sir your videos are nice. I want your videos to be shared with everyone. Write long description in your TH-cam description title before uploading. It will help people to finding your videos, this is how TH-cam search algorithm works.
Salam from Pakistan.
OK, thanks for the advice. I have made my descriptions longer in my newer videos.
Excellent video. A huge chunk of info in ten minutes. Well done.
at 4:35 i thought that when the capacitor was fully charged, that the resistor would have a no current....
only when the resistor is placed among the same branch(or in series) with the capacitors. that's why he kept saying outer branch(the one in parallel with the capacitors, which is the 10ohm and 20ohm resistors).
look at the circuit again. previous video has capacitor and resistance in a series. the resistors in this video is parallel to the capacitors.
i cannot epress how helpful it is for me . i am very thankful to u step by step science
Thank you very much for the great comment, glad that you find the videos helpful.
This series single handedly taught me rc circuits. Very helpful thank you
Great to hear! Thanks for the comment.
thanks, learned that Q total = Q 1=Q2 for the capasetors in series. that was helpful information that is essental
You are better than my Doctor come teach us 😭😭😭
Good explanation. Kee it up
Thank you, I'm trying.
8:00 it’s uF instead of uC.
Thanks for the vid!
Get it together man, can't follow cause you keep fking up your words.
stfu, he teaches physics, not general semantics.
Very helpful. You're truly channeling Sal Khan in these videos.
thanks for the comment.
There is little mistake in unit...The unit of 1/C should be 'micro farad inverse'.
Your videos are amazing
Thank you so much!
Very clear explanation
Glad you think so!
for question 2 why do you have to use the total resistance when it is specifically asking about the current going through the 10 ohm resistor?
This would be more helpful if you brought frequency and reactance into this discussion
Thnxxx.... very helpful
You are very welcome.
Please make more videos.
I'm trying, one a week.
I really appreciate your video, well explained and very useful.
I have a question: Mounting a timer with a 555 I need to know "when" the capacitor is going to arrive to 1/3 and 2/3 of the total voltage.
Let's say I have a 9v rail voltage and I want to know how long is going to take for the capacitor to arrive to that voltage with a resistor on serie. I can't find an easy way to do It. Could you help?
Thanks anyway and really god Job.
Carlos
Man thank you so much for this video! You helped me a ton
Happy to hear that, best wishes to you.
very insightful, thanks for making the video
You're most welcome, glad it was helpful!
This is such an informative and great video for the basic understanding of RC circuits. Despite the people complaining that you pronounce capacitor differently, it didn't impede my understanding at all. Great job!!!! You teach better than some college professors :)
Thanks for taking the time to write such a nice comment. Glad that you find the videos helpful. You can also see a listing of all my videos by topic at www.stepbystepscience.com
There's a math error
Where?
Nice positive (!) comment
Thank you
It is supposed to be a "nice positive comment"...but thank you for watching and commenting just the same...have a great day!
I have a question from the very end of this video.......Shouldn'd the voltage across the 6uF be 4 and 12uF be 2................and together should'nt they be 6 ohms alltogether????
Tonoy Chowdhury Sorry but no.
Brian Swarthout oh yes my bad...........after charging the v=q/c.............i got mixed up
Tonoy Chowdhury No problem.
thank you!
You're welcome!
Thanks u sir 🙂
Most welcome
thank you
You're very welcome
thank u so much!
You're welcome!
Filtor circuits
I am not sure what that is but ok, do you mean filter.
hey man ur doing a really great job. i wish i could give u a 1000 likes on my own. all of ur videos especially 3 and 4 are really really helpful. please do more videos on RL and RLC circuits
Thank you, very nice if you to say.
At 8:00, you should note that micro farads was symbolized by micro-C in your equation.
Thank you for letting me know, I will make a comment in the video. Did you find the video helpful otherwise?
yes, I have found your video helpful enough where I have subscribed to your channel.
What happens when the input is current source?
Great explanation !!
Wow!!!!!! This is so amazing ,i found what i wanted
That's wonderful, glad I could help!
Thanks a lot!
No problem, the pleasure is all mine.
If you set speed to 1.5, it will be Tom Hanks narrating the video!!
2 for the price of 1...Thanks for the comment
You can see a listing of all my videos at my website,www.stepbystepscience.com
Thank you for the videos!
Really great job with these videos. Thank you for your help!
Thank you very much for the comment.
Just wow🙏🙏
Thank you!
Easy and simple....you made it so easy....Thanks a lot
That is the goal, break everything into manageable pieces. Thank you very much for the comment.
You can see a listing of all my videos at my website, www.stepbystepscience.com
your videos are frustratingly good. wow
Thanks for the nice comment.
Thank you for the video. Simple things like 'voltage is the same when in parallel' really clear things up.
Corey Levinson You are very welcome, I try to use "regular/simple" language when possible. Thank you for the comment.
You seem very intelligent, so I want to ask you a bunch of questions I've been saving up when studying circuitry. It's a bombardment of questions, though, so you don't need to answer if you don't have the time. I'm taking physics in school so these questions will help me.
-why do you not short circuit a battery by touching both ends with your finers? is skin's resistance so high that it essentially breaks the circuit?
-what causes death? Voltage or current?
-how can birds sit on power lines?
-if a capacitor is 10 microfarads, in an RC circuit, then at t=c, where c is a random constant, the capacitor can hold the maximum charge of a 5 microfarad capacitor, maybe later the max charge for a 6 microfarad capacitor, maybe earlier the maximum charge of a 3 microfarad capacitor?
-why does a circuit complete itself if you are standing on the ground and you touch a charged conductor that's connected to a battery or transformer on the ground?
-is a battery connected to ground if its physically touching the ground or does it need to connect itself to a long metal pipe in the ground?
-does voltage come out of the negative or positive side of a battery?
-why does emf exist? Why is it important in circuitry?
-how does a capacitor charge if it's not a circuit?
-why must a circuit connect back onto itself? I understand its necessary to have a complete circuit oelectrons can flow, but why?
-if you have high voltage in a wire, why doesnt a spark form in between a switch?
-if a high capacitance capacitor is fully charged, why doesn't a spark form in between?
-Why are wires covered in conductors?
-what's so good about coaxial cables?
-if a resistor has a really high resistance, is it possible to effectively cut off the current, thus breaking the circuit?
-is a lightbulb flickering really quickly? I think the answer is no but I dont know.
-imagine two circuits each with a battery with potential V. In both circuits there is one resistor. In the fist circuit, the resistor is 1 ohm. In the second circuit, the resistor is 10000 ohms. Which circuit depletes the battery faster?
-what happens if a battery is fully charged and you try to charge it even more (i understand this question might have more to do with chemistry than physics)
-How does grounding work? Why is it important?
-what is bemf?
What would be the time constant for this circuit if there were only one capacitor?