Calculating the power of a lightbulb
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Use a Volt and a Ammeter to calculate , P=VI , shouldn't that be simple enough
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Jtiowa
trying to teach myself some basic concepts and complete a workbook I bought for self-teaching. never taken a physics class before. really enjoy learning about chemistry, biology, physiology and anatomy!
Updated on November 14, 2020Comments
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Jtiowa almost 3 years
How do I calculate the power of a lightbulb? I have values but I don't know the equation to use.
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Brandon Enright almost 10 yearsWhat values do you have?
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Jtiowa almost 10 yearsI think I figured it out. I used Ohm's law to solve. sorry I've never taken a physics class before and am trying to teach myself for fun. the values i had were .480A at 120V. I calculated 57.6 J as my answer
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Abhimanyu Pallavi Sudhir almost 10 yearsThis is not a conceptual question.
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Optionparty almost 10 yearsThe resistance of a light bulb is not linier, it changes with temperature. Cold resistance will give different results from those measured when lit.
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Jtiowa almost 10 yearswhat do the p, v and I stand for?
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Nephente almost 10 yearsCorrect equation, but I guess you mean $480mA=0.48A$... Also Joule J is a unit of energy, not Power. Volts times Amps is Watts=Joule/second.
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shortstheory almost 10 yearsP = Power V = Voltage/Potential Difference I = Current