RC Circuits (5 of 8) Charging a Capacitor, Time Constant, Voltage, Current, Worked Example
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- Опубликовано: 12 сен 2024
- For and RC circuit with a DC source this video shows how to calculate the voltage and current with respect to time while charging a capacitor.
thanks you explained it way better than my teacher
Sorry, but thanks for letting me know. You can see a listing of all my videos at www.stepbystepscience.com
@@stepbystepscience Hi, What do i do if a switch is in place, and i am asked to determine the current at the switch and what do i do if i need to find the voltage across the the cap at switch on?
@Rotten Brainz I failed my exam aha 2 years ago
@@PS-nh6ct lmao
Your videos are getting me through my undergrad ...as a physics major some concepts are hard for me to understand and you've been able to explain them so clearly I appreciate your work/videos!!! THANK YOU!!
Thanks for taking the time to write such a nice comment, hope your studies go well.
I appreciate not only that you are so well informed and detailed but also that u take the time to share your knowledge for us :)
Thanks a million for this series of videos! I was super confused about this subject and now I am very confident. I've understood this material completely. You saved my Physics prelim! Thanks a bunch.
That‘s great news. Thanks for letting me know
I'll be honest, I hardly ever subscribe to any RUclips channel now a days but you sir deserved it =)
Thanks for watching and subscribing, You can see a listing of all my videos a my website, www.stepbystepscience.com
Step-by-Step Science I'm in absolute awe good sir, thank you for showing me this before my test on Monday =)
Thanks for the comment, hope the test goes well!
Step by step is truly what you do. I like watching your videos and thanks for all your help
Great and thanks for the comment.
YAY! the internet is going to make it possible for me not to fail!!!!!!!!!!!!! THANKS for this video!
That is what the internet is there for.
Awesome....Just Awesome..
Great and thanks for commenting.
Thanks too much. Did know nothing before the first video of that playlist on this theme, but now, on the fifth video, I was able to solve everything by myself. I think it is kind of a good progress, because I needed just several hours to extend the knowledge on this topic
Great, I am very happy that you have found the videos to be so helpful. Thanks for watching and commenting.
In a word, Brilliant.
So nice of you, thanks!
Thank you so much for your videos, I have learnt a lot from you that my lectures and reading couldn't teach me.
Nice of you to say so, and thanks for taking the time to comment.
Very good. I am a US Navy trained construction electrician with a bleed resistor calculation concern. I believe you have given me enough ‘heads up’ information.
Great and thanks for the comment.
As always you save the day! Thank you so very much for this video.
Happy to help! Best wishes.
If you're lost in this video you may have accidentally skipped Video_4 and went from Video_3 to Video_5 like I did. Video_4 is out of order for some reason. I was lost the whole time until I noticed this.
Sorry about that, I put them back in the right order. Thanks for point that they were out of order. Hope you are finding them helpful.
Perfect pace for your explanations!
Thanks for saying so and thanks for commenting.
GREAT EXPLANATION!!!
Glad you think so!
pure simplicity = great
thank you. peace and love
Thanks for the very nice comment. You can see a listing of all my videos at www.stepbystepscience.com
Easy to understand the way u explain is awesome
way better than my teacher, thank you!
Loved it !
very concrete and simple explanation
Glad you think so!
holy fuck dude, this guys videos is like a exam review, i have final tomorrow and i know shit about the circuits, after i watched his video i know everything omg !
Thanks for the positive comment, great that you found them so helpful. Share with your friends.
Awesome video! Explanation was super clear! Liked and subscribed! Time to check out your other videos!
Awesome, thank you!
Thanks! I need some more training in thinking about the I(t) can be substituted with 0.75*Io . I can see what you are doing, but I don't think I would have come up with this on my own.
What should I use as training for seeing this immediately?
Thank you. That was really useful to my understanding
Glad to hear that! Thanks for your comment.
Nicely explained, best out there
thank you this was helpful
Glad it helped!
good video. One question - t and tow, I don't understand how you sometimes use t in seconds like 6 secs, and othertime you use t = t secs times RC?
Good question. We refer to both, seconds and time constants. I believe it is explained in this video ruclips.net/video/P4nR9g51CwM/видео.html
Thank you. this was extremely helpful.
Glad it was helpful!
I love you so much!
🥺❤️
for question 1 why is the formula to find V=Vb(1-e^-t/rc)? I thought it was V=Vb(e^-t/rc). where did the 1 and the minus in front of the e come from?
Thank to Author/ presenter who explain this subject clearly. But I still don't understand yet is how to calculate time to be charged fully ?
Thank you sir so valuable video u made,do u have any differential amplifier,common mode rejection ratio video in ur channel
Sorry, no.
Thanks Mate, very clear explanation.
you are very welcome, thanks for watching and commenting
Thank you very much. This is so awesome.
Great that you think so. Thanks for watching and commenting.
this was so clear!
Wow thanks for making this kind of videos 😇
You are very welcome.
Amazing video.....thank you a loooooot
You are very welcome, thanks for watching and commenting.
BRIAN SWARTHOUT, Which Buttons on the calculator has that "e"? I'm using the free windows Scientific calculate on a PC but I don't see the "e" and to add the -1 above the e
e is Euler's number, e = 2,71828
@@stepbystepscience Can you make a video showing how to use the calculator to get each of those time constant voltages because I must be doing something wrong on the calculator that I'm not getting those time constant voltages using that formula with the "e" as 2.718
another great video!
a little confused - can anyone explain - how for question 1 and 2 formulas gone from v(t)=12v(1-e-1.28) to working out the number in brackets - eg quest 2 is 12v(0.722). Where did the number 0.722 come from? How was it worked out? Thankyou for any explanation
What is e????
Perfect explanation , thank you .
Thanks for the nice positiv comment...You can see a listing of all my videos at www.stepbystepscience.com
very good sir👍👍👍👍
love from all Indian students
Thanks for the comment, tell all the students from India that I say hello.
wow great video
Thanks so much!
This is very helpful!!! Thank you so much!!
What if you have more than one resistor? Which one will you take for the time constant? Or do you need the Req?
Get the Req first.
Hello, thanks for sharing.
Please I have got a small solar panel and its out is 8v and 0.02mA, but when I add a small load, the voltage drop to 2v. I added 0ne 2200uf capacitor and the current add up from 0.02mA to 0.25 with the same volts. the capacitor takes 1 second to charge up to 8v and 0.25mA. Now I want to add up to 50 caps and put some components between the caps and the load which will be discharging each 10 caps in every other 5 seconds but the input of the caps will be connected to the panel continually to allow them charge. I need about 10AMP at the output of these 50 caps, so my question is will the output of the panel be enough to keep all these caps charged or do I need to put a boost converter between the panel and the caps?. Note that these 50 caps are programmed to be discharged randomly so there is going to be diodes but no resistors since I want to obtain high Amps at the output. Please help.
How can we find charge when switch is open
very helpful.thank you
@step-by-step Science Im a little confused on how to find voltage across the cap after one time constant? the part where u replaced the t with -9.4, Thanks
Gold.
Thanks for commenting.
Same problem with current source what happen sir ,
What happens when capacitor is constantly charging? For ex: the capacitor is 50 volt, but you use a 9 volt battery to hold a charge then use a step up converter to boost it to 50, after the capacitor is at 50 use a step down converter to 9v so the the step up converter can work and is constantly going.
well described, thanks
You are very welcome and thanks for the comment.
where did u get the 9.4s time constant? im pretty dumb :(
The time constant (RC) is 4.7 seconds and we want to know the voltage after 2 time constants (t), so 4.7 x 2 is 9.4 seconds. Does that help?
Awesome ❤️❤️❤️
Thanks so much 🤗
Thank you
Great job. - Thank you.
Thank you too for watching and commenting
What if there was a resistance "after" the capacitor? It wouldnt matter to calculate the constant, would it?
THIS IS SUPERB
TQ...
Thanks,
its possible charge capacitor linearly?
any readings?
I think not...don't work that way.
Very nice explanation
What is "e" in the V(t) equation??????
Euler's number, 2.718....
Hi, how do you get the -0.288? Thanks
I am in the same , the Log (0.75 ) = -0.124 , not -0.288
Awesome.
Good work
Hi. I have a problem. I'm stuck with this Euler's number. I know its value and also I have a calculator (on my cellphone) wit this function on it. But no matter what button combination I'm using, I simply can't get the same result as you. I have even tried some online calculators but with the same result.
is the voltage across the capacitor the same as the voltage across the resistor ??
Yes, when the capacitor is fully charged.
From where you Bring 0.75Io I didn’t understand last step
thanks!!!!
Welcome!
That could not be any clearer.
Excellent, that is the point...to be as clear as possible. Thanks for the comment.
You can see a listing of all my videos at www.stepbystepscience.com
Fucking Excellent 10/10 A+++
Thanks for all the great comments.
On question 3, i dont' undertand how you come up with 5 time constant...thanks :)
it is generally accepted that the Cap is fully charged after 5 time constants.
how do you explain this if you have to use calculation? i am afraid it wont be accepted on my case :(
To find out % charged after time constant do: (1-e^-RC), so after 5 time constant --> 1-e^-5 = 0.9932... basically 99% charged after 5 time constants, basically fully charged.
i very much like this
I like your comment very much!
Thank you sir
Welcome and all the best!
where is the 10 raised to the power -3 came from?
helpful video thx :)
Is the 12 volt supplie also refer to the capacitor voltage as well?
When the capacitor is fully charged the the voltage across it will be the same as the voltage of the battery.
Excellent
Thank you! Cheers!
this is my nice positive comment
I think that you are the first person to actually get it right "a nice positive comment". Thanks for that!
thanks broham
You bet!
What if it says what’s the voltage on the capacitor
Depends on when, but when the capacitor is fully charges the voltage across the capacitor will be equal to the voltage of the battery.
nice it wz helpful but i need a two way switch problem
I think I have one of those... You can see a listing of al my videos at www.stepbystepscience.com
I love you
Formula's that don't confuse me with differentiation? I'll take it!!
Nice positive comment
I get lots of positive comments but rarely do I actually get the "nice positive comment"...thank you very much!!
How to fin potential difference across the circuit
I ordered Raycons mid December with a 2-day ship. They are still not here. Customer service is terrible!!!
Sorry
@@stepbystepscience, Oops! My comment was for an ad before your video. I'm sorry. Your video was good! :-)
2:13 if for some reason you don't have "e" on your calculator it's kind of a pain in the neck to reach the value of 0.86466471676 unless you know a bunch of decimals following 2.71828... etc. So, here: web2.0calc.com/
Thanks for the resource.
I would just buy a scientific calculator instead, with the money he earns from youtube
1st anser t=9.7 how get,
Please as soon as possible
what??
thanks that will help me !
Potential difference
I caught everything...except the value of "e". (The last time I dealt with higher level math Email was new technology and Bush was president...The older one).
e is Euler's number and is equal to 2.7182818......
@@stepbystepscience thank you. I somehow knew that, but had it in the basement of my memory underneath a box with parachute pants and cavaricci jeans. Thank you again. Getting older is getting old.
Wow...
why does no-one explain the e in the equation .
True but no-one explains pi either....
@@stepbystepscience Yeah but they are not called step by step ? , never mind i do enjoy the vids i was in a brain freeze last night i figured it in the end .
4 downvotes -> 1 is my professor, 3 are my lab teachers
This nigga is the shit
This is assuming that your battery can supply an infinite amount of amps 😂
what do you mean
Nice work
Thank you for the comments! Cheers!