Old 09-04-14 | 10:47 AM
  #8  
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Looigi
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Originally Posted by gsa103
...The bulb has a resistance of V/I=60 Ohm. ..
The resistance of the tungsten filament increases with temperature, so the resistance of the bulb when not lit will be much less. About 1/15th the resistance of the lit filament or about 4 Ohm in this case.
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