Redrawing a Circuit: Tips & Tricks for Power Sources

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Discussion Overview

The discussion revolves around redrawing a circuit involving power sources and resistors, focusing on understanding the configuration of components (series vs. parallel) and the behavior of voltages and currents within the circuit. Participants are seeking clarification on basic circuit analysis concepts.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant expresses confusion about how to correctly draw power sources in relation to resistors, questioning whether they are in series or parallel.
  • Another participant challenges the need for redrawing the circuit, noting the absence of load nodes and suggesting that the current calculations should be straightforward.
  • A participant mentions understanding the current I1 as 6A based on a 24V source and a 4Ω resistor, but is confused about the role of a -8V source in the circuit.
  • There is a discussion about the current I2 being 16A, with one participant confirming that the voltage across the resistor is 32V due to the combination of the 24V and -8V sources.
  • Confusion arises regarding the current I3, with a participant questioning whether the 24V affects the resistor with an 8V source across it, and another participant asserting that the ideal voltage source makes the rest of the circuit irrelevant for that resistor.
  • Participants discuss the role of ground as a reference point for voltages in the circuit.
  • There is uncertainty about the total voltage and resistance in the circuit, with one participant suggesting a need for node analysis to clarify the currents.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding circuit analysis, with some agreeing on specific current values while others remain confused about the implications of the -8V source and the overall circuit configuration. The discussion does not reach a consensus on how to redraw the circuit or the effects of the different voltage sources.

Contextual Notes

Participants reference basic circuit analysis principles, but there are unresolved questions about the configuration of the circuit, the effects of the voltage sources, and the calculations of total resistance and voltage. The discussion reflects a mix of understanding and confusion regarding foundational concepts.

Magnawolf
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Homework Statement



aWALk5P.jpg


Homework Equations



I just need help redrawing the circuit

The Attempt at a Solution



I don't understand how to draw the power sources in correctly. I'm getting mixed on on whether they're in series or parallel with the resistors and such. Any tips would be appreciated.
 
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What's the point? There are no load nodes indicated, so I can't see that you are trying for a Thevenin equivalent and there is nothing wrong with the way the circuit is drawn now. What is it you are trying to do?

Edit: by the way, if you can't determine the current I1, you really need to go back and study the basics some more. There just is no way to create a more simple example of when to use V=IR
 
phinds said:
What's the point? There are no load nodes indicated, so I can't see that you are trying for a Thevenin equivalent and there is nothing wrong with the way the circuit is drawn now. What is it you are trying to do?

Edit: by the way, if you can't determine the current I1, you really need to go back and study the basics some more. There just is no way to create a more simple example of when to use V=IR
I'm trying to study the basics right now lol.

I understand I1 = 6, because the voltage is 24 V and the resistor is 4.

What throws me off is the -8V on the other side. How does it behave in the circuit?

I2 is apparently 16A. Is it because the voltage through the resistor is 32V?

Now what confuses me is I3. I3 is apparently 0.8A, which is 8V/10Ω. Does that mean the 24V has no effect on that resistor? If so, why? Does the ground play a role in this circuit?

Also, I is 22V which I don't understand at all. I'm assuming I have to find R-total and E-net. Are all the resistors in parallel? That -8V is throwing me off. Would E-net be 24+8 = 32V?
 
Magnawolf said:
I'm trying to study the basics right now lol.

I understand I1 = 6, because the voltage is 24 V and the resistor is 4.

good.

What throws me off is the -8V on the other side. How does it behave in the circuit?

I2 is apparently 16A. Is it because the voltage through the resistor is 32V?
. Yes, 24 minus a minus 8 adds up to 32.

Now what confuses me is I3. I3 is apparently 0.8A, which is 8V/10Ω. Does that mean the 24V has no effect on that resistor? If so, why?
How could it be anything else? It has an ideal voltage source across it that is 8v. That makes it irrelevant what the rest of the circuit is doing.

Does the ground play a role in this circuit?

It gives you a reference point for ALL of the voltages in the circuit.

Also, I is 22V which I don't understand at all. I'm assuming I have to find R-total and E-net. Are all the resistors in parallel? That -8V is throwing me off. Would E-net be 24+8 = 32V?

Forget the voltage. You've already FOUND all of the currents in that node except for I, so just do a simple node analysis. 16+6=22.
 
thanks bruh
 

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