I conducted an experiment with 3 different watt light bulbs and a radiometer. My results said that the 50 watt lightbulb gives off the most heat, the 100 watt gave off the least heat and 150 watt was in the middle.
My question is : With a 50-watt, 100-watt and 150- watt light bulbs, what bulb would give off the most heat? The least heat?
Thanks! This will help me write an analysis for my science formal lab report!
2007-03-11 08:43:31 · 4 answers · asked by b 5 in Science & Mathematics ➔ Other - Science
My question is: From a 50-watt, 100-watt and 150-watt light bulb, which will give off the most heat? And which will give off the least heat?
2007-03-11 09:02:11 · update #1
Your results don't make a lot of sense. That is very good, because it causes you to ask the question "what the heck is going on here?" That is good science. Should be 50 is coolest, next 100, hotest 150. But, try this idea. What is the spectrum response of the radiometer? Does it see just visible light or is it also reacting to heat that is not visible. A thousand watt toaster gives off almost no visible light at all. So, I'm guessing the difference between expectations and results has to do with where the energy winds up in the spectrum.
2007-03-11 13:38:03 · answer #1 · answered by ZORCH 6 · 1⤊ 0⤋
newly-wed's calculation ingredients the useful resistance of the 150 watt bulb, yet no longer the resistance required to grant 0.5 the capacity. If the capacity is decreased to seventy 5 watts, then the present flowing is seventy 5/12 = 6.25 amps and the entire resistance is 12/6.25 = a million.9 ohms. In concept you subtract 0.ninety six ohms for the bulb to get the fee for the exterior resistance, yet in prepare the resistance of the bulb at 0.5 capacity is somewhat below at complete capacity, so the determine is barely approximate. The exterior resistor will nevertheless be dissipating 30-40 watts and must be wisely concentrated (e.g. 60 W). that's a very inefficient way of reducing the lamp capacity. that's extra effective to apply some electronics to drop the voltage.
2016-10-18 03:10:29 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Presumably, you''re asking what it should be?
To the first order, the heat should be proportional to the wattage ratting. However, it's possible that there are differences in efficiency between the bulbs, particularly if they're not from the same manufacturer or same family of products.
2007-03-11 09:10:24 · answer #3 · answered by arbiter007 6 · 0⤊ 0⤋
You already have the results from your testing. What are you asking?
2007-03-11 08:48:10 · answer #4 · answered by Anonymous · 0⤊ 1⤋