Why light bulbs are easy to burn when the lights are turned on
That is, the normal working current of 10-15 times in such a large current, the tungsten wire surface defects are vulnerable to the impact of deterioration, and ultimately burned
So when the lights are easy to burn out the lights.
The thermal resistance of the tungsten filament lamp is 10-15 times the cold resistance. At the moment of turning on the lamp, the current will be large due to the low resistance
Tungsten wire is a positive resistance characteristic, that is, with the tungsten wire temperature increases, tungsten wire resistance will gradually increase
