RC Circuit Hard HW Problem - 4 resistors 2 capacitors

Looks at currents and voltages in an RC circuit just after the switch is closed and after the switch has been closed a long time. Shows how to use the golden rules about how a capacitor acts like a wire when the switch is first closed and how it acts like it is removed from the circuit (acting like an open circuit in fact) after the switch is closed a long time and the capacitor(s) has been fully charged. Also shows how to calculate the voltage on the capacitors after the switch has been closed a long time. In it you will see that one capacitor is charged and the other is not.

[@yarenkaya7872]

Beautiful explanation You could also find the voltage difference between the plates of 1st capacitor by creating a Kirchoff loop including 6ohm, 2ohm, and the 1st capacitor. Setting the eq. Vc-6*1-2*0=0 Therefore, Vc = 6V On the other hand, thank you for this nice video, sir!

[@Nakabozu]

Thanks so much for your explanation! I liked your analogy about capacitors acting like wires until they are fully charged. Helped me out quite a bit.

[@abhisingh1836]

Sir,this solution is really really great. The concept of Shortcuiting the capacitor initially is new to ke. Thanx.

[@alanglodowski9440]

Frank, If I remember correctly, you were fairly tall, slender dude from Lewis, was it? So why did you come across this video? Lt Col (R) Glodowski

[@khaledtarek196]

I have a question i dont know how to solve How can i contact you and send you the question sir?

[@electricresonanz1158]

Thank you for this video! I learned something important!

[@MrGamer348]

Thank you so much this video helped out a lot!

[@caperucitaroja2480]

Very well explained.

[@lovinlifegirl95]

Thanks for explaining!

[@JustinBeyerlin]

Thank you for the excellent video! I wish you had more on this stuff!

[@pycharm708]

Thanku sir for this good explanation

[@lemonlemon4435]

The title said hard , but was a piece of cake

[@roberttshitenda7878]

Good morning sir, please help me understanding of total horizontal and vertical, RL parallel to capacitor?

[@newman3126]

thank u prof Alan ....i found that very useful 4 me ....plz can you help me WITH recomended book or student book with more example for resistors and capacitors connection in DC

[@fadsmfawopefaw]

Thank you, mister!

[@Kirthikvasan]

capacitir as wires new trick learnt

[@jjay11a]

hey did u ever figure out why the cap looks like a wire at t=0

[@darkseid856]

@@jjay11a I know it's two years late . but it's because at t=0 circuit is *just closed* so the charged that got *accumulated* in capacitor is almost zero .

[@danielliu60]

holy shit you're actually the goat if anyone is reading this FUCK PHYSICS 142 WITH KEITH BERLAND AT EMORY UNIVERSITY

[@robjones2525]

thank you. This video helped a lot.

[@subhradeepmahata9470]

Excellent video!

[@billwilliams6338]

ALAN GLODOWSKI without the LOAD, how much current in amps can a 4700uf hold store with a power supply DC voltage at +450vdc? the 4700uf filter cap will charge up to +450vdc but how much current is the 4700uf holding storing? What formula can I use to calculate how much current the filter cap is storing in amps?

[@anfaltheam1166]

شكرا استمر في العمل الرائع Thank you so much

[@GauriTyagimdma]

This was cool sir

[@mansimratsingh5220]

Sir your solution for Current at t=0 is not appropriate. It should be 16/7 A in 2 ohm resistance. Plz reconsider. Regrets if I m wrong

[@renzotl56]

Mans QB it takes path of least resistance. So it just go through the 2 ohm resistor

[@makogefranklin9922]

grateful for the vido

[@alemayehuyadete9475]

Well done

[@tugaric]

Is there a way to calculate the time constante of such a circuit ? A simple circuit would be Tau = R*C .... but when you have multiple R and C components how do you calculate it ?

[@puranjays8]

4 months late, there is thevenin equivalent circuit which deals with the exact concept you were looking for.

[@Twenty_Four_7]

i thought capacitors behaved like open circuits in a dc source

[@finalfantasy7820]

This is what i'm wondering too.

[@spoderman15]

that is when they are fully charged

[@spoderman15]

For example, he uses open circuit for the caps at 3:32. He is only concerned with the first one because it disconnects the rest

[@finalfantasy7820]

Spoder Man I had stopped watching before coming there. Now i watched the full video, thank you for the information mate.

[@ZoeTheCat]

Only after ~5 effective time constants. Prior to this, current will be exponentially decaying in various loops while the capacitors are exponentially charging. Once the caps are charged (dV/dT ~0), then current is no longer flowing and Caps do indeed act like OCs. This is referred to as the "Transient Solution." and is usually not important other than to LEARN what is going on. AC Source designs seek to achieve the more important "Steady State" solutions. These topics are used to design filters (low pass, hi pass, band pass, notch, etc). But the systems can get so messy, that computer simulations (SPICE, MATLAB) and other freq response programs are used to evaluate the SS response.

[@Carbocation.]

how to find 𝜏(time constant) if the RC circuit have more than one capacitor and of course 3-4 resistors

[@thespritgamer6953]

Use Thevnis circuit problem

[@BettyMartin-m5f]

Davis Timothy Gonzalez John Williams Gary

[@ukhinmaungnyint4006]

Starting capacitor မှparallel resistor အကြောင်းသိ့ရှိ့ရန်

[@aracelygil9891]

You work this circuit pretty weird

[@user-qi8hd8ip5m]

Good

[@behelpful5010]

why didnt you solve it for any time t

[@himanshusemwal3393]

Hey 6 ohm resistor just got short circuit ,how can you find the current in it

[@jrohit1110]

WTF! Dude! i thought that you were gonna calculate the voltage as a function of time....XD!!!!

[@lordvoldemort346]

Yeah I came here for that wanted to see how would he deal with complicated differential equations or is going to explain some new method to do it

[@guillermodiaz2773]

@@lordvoldemort346 they are called trick my friends

[@lordvoldemort346]

@@guillermodiaz2773 you mean to say that I tell him on to solve 12th grade maths and he speaks the table of '5' And it is a trick Wow what an awesome trick I was looking for something else he just solved the easiest case of the problem and that is a trick Omg

[@kritiktejaswi283]

Example to Acha liyr h smjane ke liye but .. Concept ka band bna diye h ... Jo phele bar capacitor padh ra ho wo na dekhe .. Other wise Jada doubt pak love man mai ar apna ho Jan re ho wo v concept kharab kar loge ...

[@merhawihadush7997]

I think you're wrong sir!! b/c capacitors behave open circuit to dc source not short circuit.

[@YouKnowMeDuh]

No, they act like shorts at t=0 and act like open circuits after a long time since no current can flow through them anymore. The current looks like exponential decay to zero at t>=0 when charging. Look up the graphs for this if you need a visual aid, it helps.

[@ratshitpartners5757]

the capacitors would have a hard time filling with their annode connected to their cathode.

[@user-zt5yk5hc6v]

بالعربي

[@bombo09]

this is pretty bad

[@whatever3041]

it's actually very good and very methodical, you probably do not understand the basics of transient analysis

[@enki7952]

this is pure bullshit! what about tackling it like a real physicist instead of forming speculations? seriously what do i do with this method as long as i don't know the natural behavior of the circuit???

[@mounirzouhari6453]

you did this wrong . y0u need to find R equivalent first

[@caiozowyecamachocabral5413]

t>0 ???? fuck yah

[@seyedhusseini6762]

really bad explanation

[@seyedhusseini6762]

waste of time

[@kritiktejaswi283]

Example to Acha liyr h smjane ke liye but .. Concept ka band bna diye h ... Jo phele bar capacitor padh ra ho wo na dekhe .. Other wise Jada doubt pak love man mai ar apna ho Jan re ho wo v concept kharab kar loge ...