Questions tagged [nodal-analysis]

A circuit analysis method in which Kirchhoff's circuit laws are used to determine the voltage between all nodes (points where circuit elements connect) and the current through all elements. Always using in conjunction with the "circuit-analysis" tag.

A circuit analysis method in which Kirchhoff's circuit laws are used to determine the voltage between all nodes (points where circuit elements connect) and the current through all elements.

Always using in conjunction with

164 questions
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Nodal analysis: negative answers vs book's positive solutions

I am practicing nodal analysis using the book "Fundamentals of Electric Circuits," and I have encountered two problems in which I obtained negative answers, whereas the book provides positive solutions. Example 1: vs Example 2: vs Can my work…
user336518
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7 answers

How can same points have different current?

Aren't B and D the same point and shouldn't it actually be (B and B)? If they aren't the same point what should be the current from B to D? Why is it 2 amperes (from the answers) and not 10 amperes as it should be (because the two 1ohm and 4 ohm…
5
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5 answers

Determine Thevenin's equivalent circuit

I am doing my first year of engineering and have EE as a compulsory course. My teacher recently gave this question in an exam. He gave me a 5/10. He is not answering anybody's doubts. Can anyone tell me what the right answer is/ where I have gone…
4
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4 answers

Can't find error in nodal analysis

For the following circuit I did node analysis in order to find the greatest possible power at R and ended up with the equations (using node analysis): $$n_1:\frac{v_1-V}{R_1} + \frac{v_1}{R_2} = 0$$ $$n_2:\frac{v_2-V}{R_3} + \frac{v_2}{R_4} =…
4
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1 answer

Find current 'i' using Nodal Analysis

Here I know how we apply nodal analysis, but can somebody explain how can we calculate the current 'i' if there is no resistor in that particular wire? I have shown my approach and working so far. I would really appreciate any guidance to steer me…
4
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1 answer

Determine the nodal voltages in the circuit

This is a practice question from book: Engineering circuit analysis / William H. Hayt, Jr., Jack E. Kemmerly, Steven M. Durbin. — 8th ed. (pag. 91) . Determine the nodal voltages in the circuit: Ans: v1 = 3 V, v2 = −2.33 V, v3 = −1.91 V, v4 =…
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3 answers

What is the value of the current (i) and what is the right way to do it?

What exactly went wrong with the below method? Here, in the same circuit I am getting a different value for the current in the mid wire only by rearranging the circuit. I was trying to solve this unbalanced Wheatstone bridge and found that the…
user208474
3
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2 answers

Why do I read 20 microamperes instead of 5?

I am trying to do this experiment, but I can't read the current Ib. Note that the multimeter I use in this experiment is very sensitive. I don't know much about BJT transistors, so it might be an invalid transistor connection.
bleckemr
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How to find V1 and V2 using Nodal Analysis?

I would like to use Nodal Analysis to find the power absorbed by 2 Ω resistor, V1, V2, and V3. For V3, it clearly shows that it is -24V. I would like to ask is V1 the same as Vy, or they are different values?
3
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1 answer

Nodal Analysis - Kirchoffs Current Law

Hello, I am stumbling across an issue here. So in Nodal Analysis, we identify our reference point and label the voltage nodes. Then we use KCL to find out equations and solve. My book is providing an example in the picture I've provided. In the…
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RC Circuit Analysis Direction Changes Formula

In my Circuit Theory lesson, we were studying RC circuits and there was a question which I tried to make before our senior but I accidentally came up with a different answer due to choosing current direction opposite to our senior; simulate this…
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1 answer

Nodal voltage analysis in a DC circuit

I am trying to analyze the circuit given below: The reference node is in the bottom with 0 V. At nodes A and B writing down Kirchhoff’s first law equation trying to express each current in terms of the voltage across the branch. My equation for…
ytho
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Intuition on Thevenin's Theorem

In the following lecture by Prof. Anant Agarwal at 36:00, he intuitively proves Thevenin's Theorem using the following circuit simulate this circuit – Schematic created using CircuitLab If we consider the voltage across, points a & b, we will be…
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4 answers

Basic nodal analysis question

I have a question about node analysis method. The part I could not solve is the Node c's equation. In equations, C is represented by 3.Here is my question what is G5(i=GV) in the circuit. The empty wire has current but there is no voltage when I…
nrgsn
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Current passing through voltage source using nodal analysis

I did a nodal analysis on this circuit where I put the reference node at the middle part. The question was to find the current passing through 10V source using nodal analysis. I tried answering it like this in the picture but the answer key says it…
mama b
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