V^2/R=24
solve for R
b. resistance=constant*TempInKelvins
This leads us to see resistance is directly proportional to tempinKelvins
new resistance=firstresistance(newKtemp/oldKtemp)
(a) What is the hot resistance of a 24 W light bulb that runs on 120 V AC?
(b) If the bulb's operating temperature is 2700°C, what is its resistance at 2570°C?
2 answers
the resistance of a tungsten wire is used in the filament of a 60W bulb is 240 ohm when the bulb is hot at a temperature of 2020°C. what would you estimate its resistance at 20°C?
2 answers