Resistive Network. - nodal analysis

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Discussion Overview

The discussion revolves around solving a homework problem related to a resistive network using nodal analysis and other circuit analysis techniques. Participants are exploring how to calculate currents and resistances based on given voltages and resistances in the circuit.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant requests guidance on how to start solving the problem, specifically asking for tips on calculating the current through R5 and the resistance R2.
  • Another participant suggests looking at the location of the given voltage V3 to aid in the analysis.
  • There is a discussion about using voltage divided by resistance to find current, with some uncertainty expressed about this approach.
  • Participants discuss the possibility of using nodal analysis and whether it is necessary to convert all elements to current sources.
  • One participant advises against converting to current sources and suggests using KVL (Kirchhoff's Voltage Law) and Ohm's Law step by step to find voltages and currents without needing simultaneous equations.

Areas of Agreement / Disagreement

Participants express varying opinions on the best approach to solve the problem, with some advocating for nodal analysis while others suggest simpler methods. The discussion remains unresolved regarding the optimal strategy for analysis.

Contextual Notes

There is uncertainty regarding the application of nodal analysis versus other circuit analysis techniques, and participants have not reached a consensus on the necessary steps to take for solving the problem.

VisualStudio
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Homework Statement


http://learn.lboro.ac.uk/file.php/1844/Quiz_figures/Chins_Files/Q11.jpg In the above circuit
V1=17 Volts

V2=8.5 Volts

V3=4.25 Volts

I1= 4 Amps

I2= 5 Amps

R1=4.25 Ohms

R3=6.375 Ohms

R4=1.0625 Ohms

R5=2.125 Ohms

R6=2.125 Ohms
Calculate the following:
a) Magnitude of the current through R5:

b) The resistance R2:

a) Magnitude of the voltage across I1:

Homework Equations

The Attempt at a Solution


I am really unsure on how to start this question, any starting tips would be great please, this was a tutorial set in my college class.
Q11.jpg
Q11.jpg
 
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Have you looked at where the given voltage V3 is located? :))
 
what do you mean by that sorry?
 
You're wanting guidance to answer part (a)?
 
I think i know how to work out Part A - I am just guessing its Voltage divided by R?
Its part b and c, that i am stuck with
 
VisualStudio said:
I think i know how to work out Part A - I am just guessing its Voltage divided by R?
Guessing??

Its part b and c, that i am stuck with
Can you work out how many volts across R4?
Hence, determine the current through R4 ... and so on, working your way around the circuit until you have determined all parameters needed to answer the questions.
 
Sorry I'm confused now. Would I need nodal analysis for this and convert all of these to current sources?
 
You do not have to convert anything, and you can do it step by step. There is no need for multiple unknowns at the same time. NascentOxygen showed you the first two steps.
 
Sorry I'm confused now. Would I need nodal analysis for this and convert all of these to current sources?
Just use KVL to determine the voltage across R4.

Then use Ohms Law, KCL and KVL to determine voltages and currents one by one. No formal analysis and no need for a matrix of simultaneous equations!
 

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