- #1
marco123
- 7
- 0
hi all i have a question to do but i can't seem to get my head round it and i was hoping some of you might be able to explain it better so here it is:
"the coiled filaments in a main lamp and a car head lamp are made of the same material and have the same length. Use the info. below to calculate the ratio:
cross sectional area of the mains lamp filament/cross sectional area of the headlamp filament
Mains lamp: 230V; 100W Car headlamp;12V; 36W
Many thanks
Marco
"the coiled filaments in a main lamp and a car head lamp are made of the same material and have the same length. Use the info. below to calculate the ratio:
cross sectional area of the mains lamp filament/cross sectional area of the headlamp filament
Mains lamp: 230V; 100W Car headlamp;12V; 36W
Many thanks
Marco