Node Analysis on Circuit: Solving for R3 Current

Click For Summary

Discussion Overview

The discussion revolves around performing node analysis on a specific electrical circuit to determine the current flowing through resistor R3. Participants explore various approaches to the analysis, including comparisons with mesh analysis.

Discussion Character

  • Homework-related, Technical explanation, Debate/contested

Main Points Raised

  • One participant expresses uncertainty about how to conduct node analysis, mentioning a previous mesh analysis that yielded a current of 4A through R3.
  • Another participant identifies two exceptional nodes in the circuit, providing specific voltage values at these nodes.
  • A participant notes that helpers in the forum require users to demonstrate their own attempts before receiving assistance.
  • One participant outlines equations for three nodes, indicating their approach to the node analysis.
  • A later post questions the validity of the original question, suggesting that the current should flow in a different direction, indicating potential confusion about the circuit setup.
  • Another participant claims to have solved the problem by ignoring the first node and focusing on the second and third nodes, arriving at the same current of 4A.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correctness of the current direction or the validity of the question itself. Multiple competing views and uncertainties remain regarding the node analysis and the circuit's behavior.

Contextual Notes

Some participants' claims depend on specific assumptions about the circuit configuration and the definitions of nodes and voltages, which are not fully clarified in the discussion.

Rigar
Messages
4
Reaction score
0
Warned, no template, no effort
I have no idea how to do the node analysis for this circuit. I have done the mesh analysis and got the current in R3 to be 4A is this right?
 

Attachments

  • IMG_20180815_235433.jpg
    IMG_20180815_235433.jpg
    38.9 KB · Views: 328
Physics news on Phys.org
I know that there are two exceptional nodes at the center and at the first the voltage is 2v and the voltage drop across R4 is 60v
 
Our helpers are not allowed to help until you show your own attempt at the solution.
 
So
Node 1: (V2-10)/3=5
Node 2: ((V2-10)/3)-(V2/4)+((V2-V3)/10)
Node 3 (V3-V2)/10=-6
 
Rigar said:
I have no idea how to do the node analysis for this circuit. I have done the mesh analysis and got the current in R3 to be 4A is this right?

This question doesn't look right to me. Shouldn't the current flow toward the bottom right? Let's see what others think but I think this question is suspect.
 
I have solved it now. I just ignored the first node solved the second and third and got 4 A.
 

Similar threads

Engineering Solve this Circuit using both Nodal Analysis and Mesh Analysis
  • · Replies 15 ·
Replies
15
Views
4K
Engineering First Order RL Circuit: Finding a Current I2(0-)
  • · Replies 3 ·
Replies
3
Views
2K
Engineering Mesh Analysis for time domains?
  • · Replies 7 ·
Replies
7
Views
2K
Mesh Analysis AC, solving simultaneous equations....
  • · Replies 7 ·
Replies
7
Views
3K
Engineering Why is the voltage source high potential into node 1 at -12 V in this op amp problem?
  • · Replies 15 ·
Replies
15
Views
3K
Engineering How to deal with dc source on ac circuits?
  • · Replies 7 ·
Replies
7
Views
3K
Find Node A and B Voltage with Mesh Analysis
  • · Replies 7 ·
Replies
7
Views
2K
Nodal and Mesh mismatch...where am I going wrong
  • · Replies 6 ·
Replies
6
Views
2K
Engineering Opamp adder circuit: Where does the "-" come from?
  • · Replies 8 ·
Replies
8
Views
2K
Analyzing Circuit Nodes & Meshes: Find I'”
  • · Replies 9 ·
Replies
9
Views
3K