Source Free RC Circuits || First Order Circuit || Examples 7.1 || Practice Problem 7.1 || LCA 7.2(1)

(English) Examples 7.1 || Practice Problem 7.1 (Alexander & Sadiku)
ERROR: at time 14:52, Vx should be 9e^ - 0.25t V (instead of 9e^ -0.5t V),
similarly ix should be 0.75 e^ -0.25t (instead of 0.75e^ -0.5t)
This video explains source free RC circuits in very simple way. Here we discuss examples 7.1 and 7.2 and also solve practice problems 7.1 and 7.2.
A source-free RC circuit occurs when its dc source is disconnected. The energy stored in the capacitor is released to the resistors.
Consider a series combination of a resistor and an initially charged
capacitor,
Example 7.1: In Fig. 7.5, let vc(0) = 15 V, Find vc, vx, and ix
Practice problem 7.1 : Refer to the circuit in Fig. 7.7. Let vc(0)=60V. Determine vc, vx, and I0.
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[@asim_hussain]

Aslam o Alaikum Sir
I am hoping you are doing well. This is the first lecture i watched on recommendation of senior and than goes on....
Thanks alot for your supoort throughout my degree especially in COVID when i have no one to help in studies, i found you. Watching your videos boosted my confidence and academic performance.
I recently graduate in june 2023 with job and Master opportunities in hand, i must say you're one of those professors i got during my studies who left life lasting impact on my life. What i learnt from you that no matter you know someone personally or not always do your best to help, i always try my best to opt your this attitude of helping others.
JazakAllah Sir for your all kind of support.

[@ElectricalEngineeringAcademy]

Your comments have always been a source of inspiration for me. Try admission in US Univ. Also try to learn some skill during off time. Best of Luck for the future.

[@asim_hussain]

@@ElectricalEngineeringAcademy sure Sir I'm trying best to avail scholarship in foreign unis

[@iqsaleh]

Sir, Assalamoalaikum: the mistake is you have suddenly changed 1/0.4=2.5 to 0.5!

[@samiulhaqqq]

*WoW Sir You Just Cleared My Doubts. Awesome Lecture*

[@HabibaMusonda]

JazakaAllah ukhairan for this amazing video ❤

[@ElectricalEngineeringAcademy]

Welcome my dear. Best wishes

[@MuhammadAwais-rp8po]

I'm loving these lectures!!!

[@ElectricalEngineeringAcademy]

Thanks Awais. Best wishes.

[@_letslearntogether_]

Massive respect.

[@salemsami1776]

God bless you جزاك الله خير

[@ElectricalEngineeringAcademy]

Welcome dear. Pray for me.

[@diptoahmed2366]

What a great soul you are ,Sir . Massive respect ! :')

[@ElectricalEngineeringAcademy]

Thanks dear. Best wishes.

[@ElectricalEngineeringAcademy]

Thanks Ahmed. Best wishes

[@ElectricalEngineeringAcademy]

Thanks Ahmed. Best wishes.

[@praveensharrma465]

thank you sir

[@NaeemAkhtarCh]

Very nice Sir

[@mohapurushh]

Assalamu Alaikum! Thanks Sir! Helped me a lot

[@ElectricalEngineeringAcademy]

Dhannobad

[@ruffsandtruffs5327]

in example 2 why did you change the value from 12 ohm to 20 ohm and then back to 12 ohm when doing vx?

[@ruffsandtruffs5327]

and also why did the value go from 15e^t/0.4 to the 0.4 changing into 0.25?

[@ElectricalEngineeringAcademy]

Right arm has two resistors 8 ohm and 12 ohm, sum of these is 20 ohm 🤔

[@WillWinarno]

For the final example, when finding vx, arent we supposed to use the original resistance 6 ohm instead of the adjusted resistance 4 ohms?

[@ElectricalEngineeringAcademy]

If you look at the diagram carefully, you will notice that Vx is not the voltage only across 6 ohm resistor but it is also across 12 ohm resistor, so it is easier to calculate vx across 6 ||12 ohm i.e 4 ohm. You can try to find only across 6ohm by solving two mesh equations, which will off-course be lengthy and you will get the same answer.

[@christopherteo4446]

Question sir why you did now open circuit the conductor to solve Req

[@ElectricalEngineeringAcademy]

kindly give me reference of time of my video where u r stuck

[@josephsmth646]

Great

[@ElectricalEngineeringAcademy]

Thanks Joseph. Sorry for being late to acknowledge.

[@divyakharb3142]

Sir why iC equal to iR?As if capacitor is charged to initial voltage then while discharging iC should be equal to iR??

[@Zeeshan12368]

Kahan Tak pohanchay ap?

[@bilalabdulla7670]

hi sir
i study electrical engineering and iam at stage 1 ia have a problem with electrical circuit what is your advice how can i improve in this subject.

[@ElectricalEngineeringAcademy]

Watch all my videos, starting from chapter 1.

[@bilalabdulla7670]

ok but i have a quistion in my mind
what is the benefit of these things we study in circuit do we need these in reall life .

[@ElectricalEngineeringAcademy]

​@@bilalabdulla7670 Many students have same question as you have. You will never come across most of the things that you study in engineering. But what we do is try form a base (of knowledge) in students, so they will be able to solve any real life engineering problems, with just little study. So keep focussed, work hard, get good grade.

[@edgardoconcepcion8308]

what is your reference book in teaching this topic? thx sir

[@ElectricalEngineeringAcademy]

Fundamentals of Electric Circuits, Alexander And Sadiku.

[@edgardoconcepcion8308]

@@ElectricalEngineeringAcademy thx sir

[@goplay5936]

For example 2, how can we find vx other then by voltage division?

[@ElectricalEngineeringAcademy]

By ohms law ix =Vc/(8+12), now Vx =ix (12). Also by KVL find ix from , -Vc + 8ix +12ix = 0, then Vx= 12ix. By the way you do you hate voltage division ?

[@goplay5936]

@@ElectricalEngineeringAcademy no... it's just a bit confusing 😁

[@ElectricalEngineeringAcademy]

Just take daily life example. Say there are 3 boys and 2 girls. divide Rs 100 hundred in them. what will be 2 girls share. [100/(3+2)]x2. Total money divided by total people and then multiplied by number of girls (in electrical engineering, total voltage divide by total resistance, multiplied by resistance across which voltage is to be calculated)

[@HarshKumar-tw3st]

@@ElectricalEngineeringAcademy Finally I was able understand voltage division, ab clear hai.. thanks a lot

[@aneezaarshad3379]

exercise problem 7.8 please upload soon

[@ElectricalEngineeringAcademy]

ruclips.net/video/Jq3SkvjsAAQ/видео.html

[@ElectricalEngineeringAcademy]

Please share this to your friends and request them to subscribe my channel😂

[@wasi03362]

What is meaning of Vt

[@ElectricalEngineeringAcademy]

voltage across capacitor at any time t.

[@zulfiqarali2563]

اَلسَلامُ عَلَيْكُم وَرَحْمَةُ اَللهِ وَبَرَكاتُهُ‎

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Walaikum Assalam Wa Rahmatullahe wa Barakatahoo

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سر آپ اردو یا ہندی میں بات کریں انگریز کفار کی زبان ہمیں نہیں آتی

[@ElectricalEngineeringAcademy]

Aaap ki soch sahi nahi hai. English ke beghair dunyawi kamyabi bahot mushkil hai.

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@@ElectricalEngineeringAcademy plz also share urdu language video links in every video if u have made video on it

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h

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Thank you sir

[@ElectricalEngineeringAcademy]

So nice of you

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Thank you sir

[@ElectricalEngineeringAcademy]

Welcome dear.