Extremely hot - IIRC between 2,500 and 4,500 °C. Per my previous calculations, that means that the 'operating resistance' (e.g. 576Ω in your above example) would be (roughly) between 11 and 19 times the resistance at room temperature - i.e. your 576Ω resistance at operating temp would correspond to between 30Ω and 52Ω at room temperature (aka between 1017W and 1763W at 230V).
Oooh - it's gratifying to see sums actually working for once
So, were we to apply the convention you suggest for cooker elements, I guess what you're looking at would be a 1.26 kW lamp
Enough to keep you warm.you're looking at would be a 1.26 kW lamp
No need for that, they (and immersions and showers) are more or less what you would expect for the stated ratings.
- maybe, but only for a fraction of a second!Enough to keep you warm.you're looking at would be a 1.26 kW lamp
Fair enough - so I presume you're saying that you have undertaken such measurements?
I suppose it will to a certain extent.
As we've discussed before, that's very hard to know - but it surely must be appreciably cooler for an element in intimate contact with liquid water (<100 °C) than one surrounded by air at 250 °C?
As I said, that's what's difficult to know. However, one can but presume that they are designed to have a path of as low thermal resistance as possible between the filament and its casing, so it would seem unlikely that there would be massive thermal gradients between the two.
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