Well I have another question puzzling me , I think its a stupid one ,
but I will say it any way ...
Does the 1/4W film metal , can take more abuse than the carbon ones 1/4W .
In some resistor decade boxes , I found predefined Max amperes ratting for its selector = team of resistor values.
1) I do not know how they predefine those ratings ..
2) At 12 volts at about the 680 Ohm and under , the resistor specs 1/4W , comes at the none critical conditions ( low amperes that makes some sense with the ohms law )
I like also to know the max non - dangerous current for my own decade box .
but only the 0.10 ohms are at 5W , all the rest are at 1/4W ( 1 - 10 - 100 ohm 1K 10K 100K )
But as I said and above , If I was aware of the standard (reference) voltage , I would be able to calculate it,
but with out an predefined voltage , there is no standard value for Amperes ...
So, how they do it ?