Some materials increase with resistance with heat while others decrease.
A cold filament has only about 1/8 the resistance of a hot one or even less, depending on the specific filament. When an incandescent lamp is first turned on, there is a huge current surge which lasts a fraction of a second until the temperature spikes up.
A cold filament has only about 1/8 the resistance of a hot one or even less, depending on the specific filament. When an incandescent lamp is first turned on, there is a huge current surge which lasts a fraction of a second until the temperature spikes up.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Albert Einstein
Albert Einstein
