- #1
Understanding Circuit Resistance: Debunking the Myth of Zero Ohms
- Thread starter forte74
- Start date
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- Tags
- Circuit
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Discussion Overview
The discussion revolves around the measurement of resistance in electrical circuits, specifically questioning the expectation of zero resistance between Line (L) and Neutral (N) in the context of AC mains. Participants explore the implications of source impedance and circuit behavior during measurements.
Discussion Character
- Technical explanation
- Conceptual clarification
- Debate/contested
Main Points Raised
- One participant questions why the measured resistance between L and N is 0.3 ohms instead of the expected zero.
- Another participant suggests that the source impedance may be affecting the measurement, indicating it is in parallel with the circuit impedance.
- A participant mentions using software for troubleshooting electrical circuits and notes that the measurement can still show 0.3 ohms even when a wire is unplugged.
- There is a suggestion that "zero resistance" might imply infinite resistance, and a query about whether the circuit operates correctly under various switch conditions.
- Participants inquire about the context of the measurements, including whether they are taken on a real circuit or within software.
Areas of Agreement / Disagreement
Participants express differing views on the interpretation of resistance measurements and the factors influencing them. The discussion remains unresolved, with multiple competing perspectives on the nature of resistance in the circuit.
Contextual Notes
Limitations include potential misunderstandings of circuit behavior, the influence of source impedance on measurements, and the context of the measurements (real circuit vs. simulation).
