I'm thinking of building a resistor decade box.
Something that confuses me is that the designs I've seen seem to use resistors of all-the-same power rating, typically around 1W.
I was thinking of speccing mine for up to 10V voltage instead -- so for dialed in 1 Ohm, that resistor would have to be able to handle 100W, for 2 Ohms the second series resistor would need to handle 50W, for 3 Ohms the third 33W, etc.
Seems that a fixed-voltage specced box would just be much easier to use when working on eg. battery powered devices.
Am I missing something? Is it just assumed that these boxes are used only with current-limited power supplies, or is there another reason why a max-power spec instead of max-voltage spec is typical one?