Relation b/w elctrical resistance and stress-strain

AI Thread Summary
The discussion centers on the relationship between electrical resistance and the stress-strain effect observed in a spring coil heater. When the coil was straightened, it exhibited a different heating pattern, with the straight section being less "red hot" than the coiled part. This phenomenon is attributed to increased airflow cooling the straight wire compared to the coiled configuration. The impact of stress-strain on electrical resistance is acknowledged, but the primary factor in this case appears to be the cooling effect. Understanding these dynamics is crucial for optimizing heating elements in various applications.
ank160
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Hey All!

My question is regrading a subtle observation that i made when i was straing at my "spring coil type" room heater. Accidently i pulled up some stands of heating coil spring to make them straight section (obviuosly when it was switched off). Then, when i passed current through it, after some time, i found that the straight section's color was less "red hot" than the other part of spring.

Does it has anything to do with change in electrical resistance with stress-strain.

Please explain.
 
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More likely, this is because there is more cooling air flow around the length of straight wire than around the same length of "coiled up" wire.
 
AlephZero said:
More likely, this is because there is more cooling air flow around the length of straight wire than around the same length of "coiled up" wire.

Thanks for the explanation.
 

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