Calculating the power of a lightbulb

1,159

Use a Volt and a Ammeter to calculate , P=VI , shouldn't that be simple enough

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Jtiowa
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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, 2020

Comments

  • Jtiowa
    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.

    • Brandon Enright
      Brandon Enright almost 10 years
      What values do you have?
    • Jtiowa
      Jtiowa almost 10 years
      I 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
    • Abhimanyu Pallavi Sudhir
      Abhimanyu Pallavi Sudhir almost 10 years
      This is not a conceptual question.
    • Optionparty
      Optionparty almost 10 years
      The resistance of a light bulb is not linier, it changes with temperature. Cold resistance will give different results from those measured when lit.
  • Jtiowa
    Jtiowa almost 10 years
    what do the p, v and I stand for?
  • Nephente
    Nephente almost 10 years
    Correct 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.
  • shortstheory
    shortstheory almost 10 years
    P = Power V = Voltage/Potential Difference I = Current