The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 lamps, when not in use? |
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a) |
b) |
c) |
d) |
The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 lamps, when not in use? |
|||||||
a) |
b) |
c) |
d) |