Determine whether each circuit element is a source or a resistor

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Discussion Overview

The discussion revolves around identifying circuit elements as sources or resistors within a specific circuit diagram. It includes aspects of homework-related problem-solving and conceptual understanding of circuit components.

Discussion Character

  • Homework-related, Conceptual clarification

Main Points Raised

  • One participant states that it is impossible to determine whether an element is a source or a resistor based solely on equivalent resistance, voltage, and branch current.
  • Another participant suggests that only sources can increase potential in the direction of current flow, while resistors show a potential drop in that direction.
  • A participant expresses confidence in identifying specific elements (h, c, and e) as sources, while considering the rest as resistors.
  • Another participant encourages checking results by solving for currents in the circuit.

Areas of Agreement / Disagreement

There appears to be some agreement on the identification of sources and resistors, but the initial uncertainty expressed by the first participant indicates that the discussion is not fully resolved.

Contextual Notes

The initial claim about the inability to distinguish between sources and resistors highlights a potential limitation in understanding circuit behavior, which may depend on additional context or definitions not provided in the discussion.

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Homework Statement


In the circuit as shown in Figure 4, there are three independent sources and
five ordinary resistors.
(a) Determine which of the circuit elements are sources and which are
resistors?
(b) Determine the value of the resistance for each of the resistors.

http://img845.imageshack.us/img845/5295/unledvhg.png

Homework Equations



The Attempt at a Solution


Since every element can be reduced to an equivalent resistance, voltage, and branch current, it is impossible to tell whether any given element is a source or a resistor.

My answer is wrong, and I couldn't find any similar questions or examples in my textbook to reference. The professor did not address this in class and I do not know where to start.

EDIT: I only need help with part a. I did part b with no problem of course.
 
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HINT: Only sources can increase potential in the direction of current flow. Resistors always show a potential drop in the direction of current flow.
 
Ah, thanks. That makes a lot of sense. So h, c and e are sources, and the rest are resistors?
 
Yes. Check your results by solving for the currents in your finished circuit.
 
Thanks again. Wish there was a kudos button :)
 
:smile: You're quite welcome!
 

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