Find Voltage in the following circuit

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    Circuit Voltage
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Discussion Overview

The discussion revolves around determining the voltage in a circuit using nodal analysis and the interpretation of a dependent source. Participants are exploring the application of various circuit analysis techniques, including nodal analysis, KVL, and KCL, while addressing confusion regarding the nature of a specific dependent source in the circuit.

Discussion Character

  • Homework-related
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant seeks confirmation on the correctness of their nodal equations and circuit redrawing, expressing confusion about the dependent current source.
  • Another participant asserts that the source in question appears to be a voltage source rather than a current source.
  • A participant challenges the assertion of it being a voltage source, citing the presence of a current running across the top of the circuit as a basis for their interpretation.
  • A later reply supports the voltage source interpretation, noting the characteristics of a controlled source and suggesting that KVL loop equations might be a more straightforward approach, while also recommending the use of a supernode for nodal analysis.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether the dependent source is a voltage or current source, indicating multiple competing views remain regarding its interpretation and the subsequent analysis approach.

Contextual Notes

Participants reference the need to consult course materials for clarification on the standard representations of sources, highlighting potential limitations in the interpretation of circuit elements.

naivy
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Homework Statement



mcPKs.png


Homework Equations



nodal analysis, kvl, kcl, loop analysis?

The Attempt at a Solution



Can someone please tell me if my nodal equations look right?
Did I redraw the circuit properly?
Mainly I'm confused about how to treat that dependent current source at the top.

esxY8.jpg
 
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The source at the top looks like a voltage source, not a current source.
 
But the initial problem has a current running across the top, which led me to think that it's a current source. Are you sure it's a voltage source? If so, I have absolutely no idea how the nodal equations will work...
 
naivy said:
But the initial problem has a current running across the top, which led me to think that it's a current source. Are you sure it's a voltage source? If so, I have absolutely no idea how the nodal equations will work...

I see the classic diamond shape of a controlled source and within it + and - designations for polarity. To me that says "voltage source". If it were a current source I'd expect to see an arrow inside. To be on the safe side check with your reference materials for your course, which will likely follow a common standard.

This looks like a case where KVL loop equations will be a straightforward way to go. If your heart is set on nodal analysis, consider that a judicious choice of supernode will help :wink:
 

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