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soccerkid12 soccerkid12
wrote...
Posts: 10
Rep: 0 0
12 years ago
A certain lightbulb has a tungsten filament
with a resistance of 14ohms
 when cold and 156 ohms

when hot.
Assume that  , the tem-
perature coefficient of resistivity of tungsten,
is 0.0045 (?C)?1 and that the temperature of
the cold filament is 50?C.
Answer in units of ?C.
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Replies
wrote...
12 years ago
electricity and magnetism
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