Electrical circuits conceptual question

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Homework Help Overview

The discussion revolves around the distribution of voltage in electrical circuits, specifically in series and parallel configurations with both equal and unequal resistances. Participants are exploring the relationship between resistance values and voltage distribution.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to understand how voltage is distributed in series and parallel circuits based on resistance values. Questions are raised about the implications of equal versus unequal resistances and the potential for negative voltages in the context of Kirchhoff's laws.

Discussion Status

Some participants express uncertainty about the effects of resistance on voltage patterns and seek clarification on how these concepts interrelate. There is an ongoing exploration of the principles governing voltage and current in circuits, with no clear consensus reached yet.

Contextual Notes

Participants are discussing fundamental circuit principles, including Ohm's law and Kirchhoff's laws, while grappling with the implications of these principles on voltage distribution. The conversation reflects a need for deeper understanding rather than a straightforward solution.

jaejoon89
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1) What is the pattern for how voltage gets distributed in a series circuit with equal resistances? what about with unequal resistances?
2) What about in a parallel circuit for equal resistances? with unequal resistances?
In either scenario, is there any relation btwn the size of resistance and size of voltage?
 
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jaejoon89 said:
1) What is the pattern for how voltage gets distributed in a series circuit with equal resistances? what about with unequal resistances?
2) What about in a parallel circuit for equal resistances? with unequal resistances?
In either scenario, is there any relation btwn the size of resistance and size of voltage?

Apparently you are interested in V=I*R, and the sum of the voltages in a loop are 0. Likewise the sum of the currents into a node are equal to the sum of the currents out of a node.

The rest of your question then is determining equivalent resistances, which follow from these 3 principles.
 
Thanks, but I'm still not sure I understand how that'll affect the pattern... does that mean there will be negative voltages so the sum is 0? I imagine with equal resistances, voltage would be equal both for parallel and series, but I'm not sure...
 
jaejoon89 said:
Thanks, but I'm still not sure I understand how that'll affect the pattern... does that mean there will be negative voltages so the sum is 0? I imagine with equal resistances, voltage would be equal both for parallel and series, but I'm not sure...

If you have current you have a voltage source. Your loop is a complete circuit.

For equal resistances then your current being the same in series will result in what ... ?
 

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