Denis McMahon:I can't explain acceptable voltage drop other than to explain that "voltage drop" is not an acceptable expression for an analytical engineer. My physics teacher, long ago in school days, would mark our homework down if we used that expression. The correct expression is "potential difference". He would rig up glass accumulator cells, connected in various bizarre ways, and then check across various pairs of terminals with a voltmeter, to ram home the point. (Which he did very effectively - I remember those classes as though they were yesterday.)
Even the term "voltage" was not acceptable. We don' say "ohmage" for resistance, or "amperage" for current. (Well maybe we do for some specific commercial purposes, but not for formal engineering.) "Voltage drop" is about as logical as "position displacement" for distance.
You can whinge about terminology all you like, but my Collins English Dictionary lists both "voltage" and "amperage" as words.
Trying to explain "voltage drop" is a lot easier than something like "difference in potential difference".
Denis McMahon:I can't explain acceptable voltage drop other than to explain that "voltage drop" is not an acceptable expression for an analytical engineer. My physics teacher, long ago in school days, would mark our homework down if we used that expression. The correct expression is "potential difference". He would rig up glass accumulator cells, connected in various bizarre ways, and then check across various pairs of terminals with a voltmeter, to ram home the point. (Which he did very effectively - I remember those classes as though they were yesterday.)
Even the term "voltage" was not acceptable. We don' say "ohmage" for resistance, or "amperage" for current. (Well maybe we do for some specific commercial purposes, but not for formal engineering.) "Voltage drop" is about as logical as "position displacement" for distance.
You can whinge about terminology all you like, but my Collins English Dictionary lists both "voltage" and "amperage" as words.
Trying to explain "voltage drop" is a lot easier than something like "difference in potential difference".
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