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Homework Help: A 60W lamp and a 120W lamp

  1. May 14, 2015 #1
    A 60W lamp and a 120W lamp each have a potential difference of 120V across their terminals.

    a) What is the current through each lamp?

    I think you use the formula I = P/V and so:

    Lamp #1 = I = 60/120 and Lamp #2 = I = 120/120

    But I don't know if that is right?

    Thank you so much for the help!
  2. jcsd
  3. May 14, 2015 #2


    User Avatar
    Gold Member

    It's absolutely correct.

    ( Generally: Remember units. If they don't match, you have made an error ).
  4. May 14, 2015 #3
    Ok, thank you!
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