Why is the incandescent lamp burned at the moment of turning on the lights?
It will produce a moment of high current, by Joule law we can release a lot of heat
Then when the filament temperature increases, the filament resistance also increases,
This moment is easy to blow the filament.If the lights are turned on, the filament is not blown
The resistance of the filament is proportional to the temperature, so when the 220V voltage is applied to both ends of the filament
Incandescent lamp lights the moment, the incandescent filament temperature is still very low
