# Nodal Analysis with two sources

Discussion in 'Homework Help' started by Thanesharan Kanan, Jul 9, 2016.

1. ### Thanesharan Kanan Thread Starter New Member

Jul 9, 2016
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Hey. I'm new here and also to this Electrical components subjects. I Really got no idea on how to do it.. As far as I know , we need to use using node-voltage analysis. Please help me with this.

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2. ### shteii01 AAC Fanatic!

Feb 19, 2010
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got textbook?

3. ### Thanesharan Kanan Thread Starter New Member

Jul 9, 2016
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No. I got this as an assignment..

4. ### WBahn Moderator

Mar 31, 2012
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So YOU need to show YOUR best effort to work YOUR assignment. That will give us a starting point from which to see where you are going wrong and how to help you move forward.

Thanesharan Kanan likes this.

Jul 9, 2016
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Alright.

6. ### Thanesharan Kanan Thread Starter New Member

Jul 9, 2016
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We have three nodes there.. so let's take 1,2,3 nodes from.left to right

V1=100v
2 and 3 is supernode. So I can say.. I assumed all current are leaving so.
I1+i2+i3+i4=0

So... (V2-V1)/10+V2/60+V3/20+V3/30=0

And to find Vo=V1-V2
4V∆=V2-V3

This is what I came out with. Is it correct.?

7. ### WBahn Moderator

Mar 31, 2012
23,193
6,986
And I1, i2, i3, and i4 are....? Don't use things that you don't define. It forces people to guess what you mean and engineering is not about guessing.

Each of those terms is meant to be a current, yet as written, they are all voltages. Track your units properly throughout your work.

Supernode 1,2: (V2-V1)/10Ω + V2/60Ω + V3/20Ω + V3/30Ω = 0

But other than the units, your node equation is correct.

So far, so good. You are very close to solving it.

What is V∆ in terms of your node voltages?

Thanesharan Kanan likes this.
8. ### Thanesharan Kanan Thread Starter New Member

Jul 9, 2016
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Alright. Give me some time.. I will write down everything and show you..