IHelp with Electronics Circuit Problem: -4.444V & 98.75W

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Discussion Overview

The discussion revolves around a problem related to an electronics circuit, specifically focusing on calculating a voltage (V0) and power (98.75W). Participants are exploring the methods to derive the given answer of -4.444V, while addressing potential misunderstandings in the setup and equations involved.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant presents an equation for V0 but expresses confusion about the method to arrive at the answer provided in their textbook.
  • Another participant suggests checking the definition of V0 as it appears in the diagram, implying a possible misinterpretation.
  • A different participant points out a potential error in sign convention, indicating that the current should flow from high to low voltage, which contradicts the original equation presented.
  • One participant questions the relevance of the "diamond voltage" in solving for V0.
  • Another participant proposes a revised equation for V0, suggesting that the initial equation may be incorrect.

Areas of Agreement / Disagreement

There is no consensus on the correct approach to solving for V0, as participants express differing views on the equations and definitions involved. Multiple competing interpretations remain unresolved.

Contextual Notes

Participants have noted potential issues with the diagram and the definitions used, as well as the sign conventions in the equations presented. These factors may affect the clarity and correctness of the proposed solutions.

p75213
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I have been teaching myself electronics from "Fundamentals of Electric Circuits". Can somebody help me with the attached problem? I know the answer, as it is given in the back of the book. However the method used to arrive at the answer eludes me. The answer is -4.444V and 98.75W. I have been able to figure out subsequent problems but this one has me stumped.
I get the following equation for V0 -> V0/4=(10+2V0)
 

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Check the definition of V0 on the diagram. It's not what you wrote in the equation.
 
Yea, check your signs. Current goes through a resistor from high to low voltage, your equation has charges gaining energy from the resistor.
 
Thanks guys.
 
the picture is very confusing, what is the diamond voltage??
 
The diamond voltage is not necessary to figure out v0. The correct equation for v0 is v0/4=-10-2v0.
 

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