Nodal Analysis for Circuits Explained

This tutorial just introduces Nodal Analysis, which is a method of circuit analysis where we basically just apply Kirchhoff's Current Law (KCL) at each node with an unknown voltage. You can choose to ground any of the nodes, but generally, grounding one with the most branches (especially if they are voltage sources) will make the problem easier. We will end up with one equation per unknown node voltage, and can just solve the system of linear equations to find the branch currents.
This video is part of a full free course on electric circuits. The course covers DC circuits, circuit laws, current & voltage sources, series & parallel resistors, nodal analysis, mesh analysis, and AC circuits.
Links to the course are here:
Website: www.engineer4free.com/circuits
UA-cam: • Circuits
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Thanks for watching, I hope it helps!

[@Engineer4Free]

Scroll up and leave a 👍!!
Full Circuit Analysis Playlist is Here: ua-cam.com/play/PLOAuB8dR35ocf9Typ1iX9NRmX0V04UYfQ.html

[@yerraboluvenky3426]

How ur writing kcl formula I3-I1-I2

[@gladys5753]

Studying online,I didn't understand how my lecturer went about nodal analysis and here I am, understanding, thank you so much

[@Mikebigmike94]

Thank you! Im reading through a circuit analysis book and its difficult to stay focused, not the most exciting read but its fundamental stuff to be able to learn more interesting topics. I am glad videos like this exist it saves a bunch of reading!

[@alifamran6165]

I've been looking solution if there are 3 fractions for hours now and i'm glad i found this video! i'm so dumb at math and thank you for saving my life

[@samirbhandari92]

Same here

[@zim_al_ghul1397]

xDD same, I was able to solve harder circuits containg more nodes, but here with only one node and 3 fractions, my brain gone brrrrr.

[@user-ib6bg7qf4r]

thank u sooo mu ch i've been watching the same thing for hours in turkish i was feeling like it's a punishement, but u explained it in such a nice and simple way, thank u again

[@clovischefor6869]

We actually solved this exercise in class but I didn't understand, now I get it all,thanks

[@adarshshreshth9614]

Thnx man literally i saw lots of video of nodal analysis but couldn't understand that much

[@harichandandasramanathan2753]

My test is today afternoon and I couldn't understand it from the notes but this video helped me alott thanks man

[@Aryan-dc8kr]

Thank you sir,this topic is very important for my JEE exam,almost 1.1 million students appear for this exam in India😢

[@Nope_dontknow]

good luck!

[@GenesisZeroTechnology]

Beautifully explained. Thank you

[@beatsme670]

For real, thank you so much! I like how you make hard topics easier to understand :D

[@Engineer4Free]

Thanks for watching! Glad I can help ☺️

[@michaelmyers3507]

Question if there were parallel branches from Va to the 3 volt source with resistors would i just take Req or make more currents for the nodal equation ?

[@user-il6ul3ex6x]

Thanks for the beautiful explanation

[@denamcmillan1482]

This was awesome! Thank you!

[@southmoreconlin3757]

Thanks, cleared things up for me fast.

[@user-kd6uk2xr4i]

Very good video. I really understood it, thanks a lot.🙏🙏💯💯

[@aidankim2139]

Is there a video for nodal analysis with 2 currents and 2 nodes

[@ADITIS-ss5ne]

Can u suggest any book where I can solve more questions on this topic?

[@akshithraj9584]

neatly explained

[@mallikarjunan8024]

Nice and simple video

[@Hfg367]

Wow it was easy explanation to understand.thank you sir alot of love from India ❤️

[@Engineer4Free]

Glad you liked it! I was in India last year, which state are you from?

[@dutonic]

This is great, thanks so much dude

[@shituniverse1]

Your videos are keeping me sane, but I also wish you did explain how to get Va, Vb, and Vc.

[@eggxecution]

very clear I like this and this is the video where I finally understand how to set resistor polarity lol

[@brayanhernandez1876]

TYSM this really helped !

[@yosefpatinio3669]

it is possible to do nodal analysis for a voltage and resistor only? (one loop only)

[@guillaume6373]

Great video, thanks

[@Engineer4Free]

Glad you liked it!! =)

[@immyt8696]

This z awesome.thanks very.much our lectures just rush up

[@Engineer4Free]

Glad I could help!! =)

[@josephtraverso5355]

Thank you!

[@mannyjacobo8499]

Thanks for giving me hope 🙏

[@Engineer4Free]

You can do it!! I have many more circuits videos here: engineer4free.com/circuits =)

[@Abdullah_klx]

عالجد يارجولة 💖💖

[@mdjonimia3569]

Thank you so much

[@siddharthpg2919]

thank you so much !!

[@benitezdenmarkvincentr.3526]

itis truly helpful

[@user-rt6ij3rz5y]

You are a legend

[@anastarafder2637]

why did u plus the Va at 6:02

[@ren5124]

What if the polarity of the 2V source was switched? Like the negative sign at the top and the postive sign at the bottom.

[@revanthkolla]

assume the current to be in the opposite direction

[@marthaobagillian9754]

Thanks this is helpful

[@Engineer4Free]

Glad to hear it! =)

[@DrakeDamron]

wow, thank you

[@geocors6139]

thumbs up finally understood the topic

[@kairavb]

Thankyou friend :)

[@robertleechford4250]

Great

[@celeb1714]

Thank you soo muchh!! This is the simplest explanation for me so far

[@Engineer4Free]

Glad it helped!!! =)

[@shahdeddahane4090]

thank you

[@ashfaquehussain2716]

Nice Explanation

[@Engineer4Free]

Thanks bro

[@hugo112max]

You were in the Netherlands while making this video right? I could hear it by the ambulance siren in the background noise at 3:56

[@Engineer4Free]

Lol wowwww, good detective work! I did record this one in the Netherlands 😂😂. I can barely even hear the siren on my headphones, let alone identify which country it's from. So good job haha 👏😁. I've actually recorded these videos in many countries, and trying to hide the background sounds is always a challenge! There are some exotic sounds throughout many of my videos 🤣

[@safayiakako3416]

Good!

[@Mo.sameh2023]

ممتاز 👍🏻

[@HarshYadav2004]

Tysm:)

[@Engineer4Free]

You're welcome, thx for watching!

[@cjesguerra5575]

how did u get the 1.143v?

[@CORExisnthere]

dividing by 7 on both sides, so 7Va/7=8/7 basically Va =8/7 that is 1.143 v

[@deepthidasari2129]

Thank you

[@Engineer4Free]

Thanks!! 🤗

[@no_melon]

What if I get a negative V2? What does that mean?

[@CORExisnthere]

it means the polarity you assume is opposite of actual polarity, its stilla correct answer (correct me if im wrong)

[@redroses4679]

Hi how do you find Va

[@Engineer4Free]

Hi yeah its shown in the video

[@Aryan-dc8kr]

4:26 Sir shouldn't we do Vfinal-Vinitial😢,plz help sir

[@CORExisnthere]

not nececary its because we assumed the Va to be smaller than 3v so we always subtract smaller from greater (correct me if im wrong)

[@SXZLegionary]

I have a question. Why did you multiply everything by 4? I am looking through my class notes and on one of the examples they multiplied everything by 60 and another example by 120. I'm struggling to understand where those numbers came from.

[@beet311]

well you just multiply by whatever number to get rid of the fraction, in this case we get 4 from the denominator

[@beet311]

also whenever an equation is equal to zero we can multiply it and divide it by any number we want (except for 0)^

[@SXZLegionary]

Thanks!

[@universeexpansion9982]

great

[@Engineer4Free]

thx

[@Salut-od2ld]

At 3:26 why did you say the moment is anticlockwise when it's being rotated clockwise ua-cam.com/video/smoPlJiLmac/v-deo.html

[@Engineer4Free]

Counter clockwise is the positive sense for moments. F1 alone would cause the wrench to rotate clockwise about A, same with F2, and F4. All forces individually would cause a clockwise rotation. Notice how the moment caused by each force is a negative value? It just means that it's a moment with ___ magnitude, and the negative sign means it's going opposite the positive convention. A positive moment would mean the force tends to cause a counter clockwise rotation, but these are all negatives, and they all have the tendency to cause clockwise rotations, so hence their sign is negative. Hope that helps clear it up.

[@yesicarobles8122]

Why are you multiplying by 4 at 4:53?

[@teamo8033]

Just to make the equation neater by removing the denominators. He multiplied both sides of the equal sign by 4, so the equation communicates the same information as it did before the multiplication. On the right side of the equal sign, 4*0=0.

[@mastersnoop454]

God bless

[@karnez05]

So your not solving for current?

[@zarithevill]

gotta use KVL instead if you're solving for the current

[@kacperszeremeta9712]

A taki kawał mi się przypomniał
Przychodzi zakonnica do castoramy
-Gdzie znajdę jakieś haczyki czy kołki do obrazków?
- A co siostra chce powiesić?
- Jezusa na ścianie.
- A to może tradycyjnie, na gwoździach

[@krisnastha3938]

Really appreciate your work. 👍
But the figure has ony two nodes not five.

[@madday9589]

Actually it has 4 nodes, one he made grounded

[@Insighttvnewske]

redo this

[@okediyaelijah9823]

You are too fast in explaining try to talk a bit slow

[@Engineer4Free]

Sorry, try setting the speed to 0.5x maybe! Good luck 🙏

[@gouravrao564]

Bro at least speak clearly 👎