Nodal Analysis Example Problem #1: Two Voltage Sources

This tutorial works through a Nodal Analysis example problem. Nodal Analysis 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 example problem features two voltage sources.

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:

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Thanks for watching, I hope it helps!

[EngineerFree]

Scroll up and hit that 👍 button if you found this video helpful!

[isaacmwangi]

Thanks, though you have made a mistake at kcL B, because if you multiply -4(2-vB)
You are supposed to get ( -8+4vB)
So that you get =2vB-VA+vB-8+4vB
If you solve further you get vA=7vB-8

[bexleynessia]

I hate long video tutorial and yours is just so brief and simple easy to understand and fast to learn a big topic in less then 10 minutes thank you for this so helpful

[md.abdullahalrafi]

100x better than my university teacher.

[spoon]

This one and the explanation made Nodal analysis so much more understandable

[AlexTheTech]

5:05 Its supposed to be -18+6va, because negative times negative becomes a positive.

[sarathybhaskaran]

This guy made my day, and now i can teach my girlfriend!
You get a subscription.

[rotimiamudeli]

In NIGERIA, lecturers don't teach. They just give course outlines then ask you to go study yourself with brief explanations.

[ChiefYOUtuber]

7:02 For the second KCL you did an algebraic mistake. It is not +4 but -4

[cosmos]

In KCL - A you multiplied -6 by -va which you have as -6VA which should be +6VA . If it was -6VA you would not have 13VA but instead just have 1VA.. to get 13VA it has to be positive.

[Watatsuu]

thankyou you are better than teach in my prof.

[santucigod]

Totally amazing. I really could understand thanks to you.

[antoni]

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[MaxwellKampindu]

Life made simple thank you very much.. very simplified

[merrysanjenbam]

Hi, I like your teaching but i have one doubt in this video. I want to know why i3 goes on right side? can't it go to left too? Please reply! much appreciated

[jamaicagonzaga]

Sir thank you so much, you saved my day....I already subscribed your channel....Thank you and God Bless

[electriccircuits]

*“We learn more by looking for the answer to a question and not finding it than we do from learning the answer itself.”*

[officialfayomi]

Am i the only one who noticed that he made a mistake in KCL B, while subtracting I5 from I4 and I3. He changed I5 sign from minus to plus.

[IceBelly]

Thanks for this video, my guy saving my assignment rn

[KEERTHANACHIRRA-pt]

TQ for this sir..I am able to understand ur calsses easily