Why Does a Filament Light Globe Draw More Current Initially?

[cseet]

Hi there,

can anyone pls explain why
1. the current through a filament light globe is greater in the first few milliseconds after it is turned on before it reaches it's "steady" glow?

2. is it better to have headlights in a motos vehicle connected in parallel rather than in series?

greatly appreciated!
Cseet

 

[Integral]

1. filliment resistance is temperature depentent.

2. In series one goes out both go out. In parallel they go out one at a time.


You do realize we have a homework help forum?

 

[Michael D. Sewell]

The resistance of an electrical conductor varies with it's temperature.

Wired in series, if one headlight failed, the current would no longer be conducted to the other headlight.

 

[cseet]

Hi there,

thanks for your help.

I now realized that there's a homework help section... I'm new to this forum. thanks again
cseet