Conductor Cross Section: Small vs Large Copper Wire in 9V Battery Experiment

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SUMMARY

The forum discussion centers on the performance differences between small and large copper wires in a 9V battery experiment. The small copper wire successfully powered a light, while the large copper wire failed to do so. A potential issue identified is the insulation on the large wire, possibly a clear lacquer, which may prevent electrical conductivity. Users are advised to scrape the surface of the large wire to check for insulation.

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leVanw
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I connected the small copper wire and the light to a 9V battery, the light came on, but when I changed to the large copper wire, the light did not light up.
 
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The large copper wire might be insulated with a clear layer of lacquer? See if you can remove a clear surface layer by scraping the surface with a sharp blade.
Any luck?
 
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