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Bernard Cleyet wrote:
I question several of the questions or answers,
OK....
especially # 45.
What's wrong with that?
I got the approved answer.
The test assumes all incandescent lamps have a positive
temp. coefficient of resistance,
What's wrong with that?
The instructions mention "the word or expression that, of those given,
best completes the statement or answers the question."
Assuming a positive coefficient seems much better than assuming the
opposite. That's certainly the rule rather than the exception.
-- There is experimental evidence supporting such a rule
-- There is theoretical evidence supporting such a rule:
electron-phonon scattering and all that.
If this were a classroom situation I would say "come in tomorrow
with a non-perverse counterexample and I'll give you 10 points
extra credit".