Discussion Overview
The discussion revolves around the relationship between voltage (V), current (I), and resistance (R) in electrical circuits, specifically addressing the question of why resistance is defined as R=V/I rather than I=V/R. The conversation touches on definitions, conventions, and the implications of these relationships in electrical theory.
Discussion Character
- Conceptual clarification
- Debate/contested
Main Points Raised
- Some participants assert that voltage is proportional to current, leading to the equation V=(a constant)*I, where the constant is resistance (R).
- Others propose that it is possible to express current as proportional to voltage, suggesting that R could be redefined as I/V, but caution that this would require a different name for the constant to avoid confusion.
- One participant mentions that the proportionality constant for current over voltage is known as conductance (G), which has units of Siemens.
- Another participant argues against the idea of I being proportional to V, stating that it contradicts the current definition of resistance, although they later clarify their misunderstanding of an earlier post.
- There is a mention of the historical context of conductance units, which were previously referred to as mhos.
- One participant emphasizes that resistance is defined as it is by convention, with no inherent reason behind it.
- Another participant notes the distinction between resistance (R) as 'how hard' and conductance (G) as 'how easy'.
Areas of Agreement / Disagreement
Participants express differing views on the definitions and relationships between voltage, current, resistance, and conductance. There is no consensus on whether it is appropriate to redefine resistance in terms of current and voltage.
Contextual Notes
Participants acknowledge that the definitions of resistance and conductance are conventions, and there is an underlying complexity in the relationships that may not be fully resolved in the discussion.
