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Homework Help: Ratio of resistance in parallel and series

  1. Mar 12, 2010 #1
    1. The problem statement, all variables and given/known data
    Two resistors R1 and R2, where R1 > R2, are connected to a voltage source with voltage V. When the resistors are connected in series, the current is Is. When the resistors are connected in parallel, the current from the source is Ip = 8.0Is. What is the ratio R2/R1?
    I have played with this and I don't understand how to get it. Any help would be awsome
     
  2. jcsd
  3. Mar 12, 2010 #2

    tiny-tim

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    Welcome to PF!

    Hi mitsuruangel! Welcome to PF!

    (try using the X2 tag just above the Reply box :wink:)

    What formulas are you using for Ip and Is, as a function of V R1 and R2 ? :smile:
     
  4. Mar 12, 2010 #3

    berkeman

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    Re: Welcome to PF!

    I'm not seeing any tags in my view, tiny. Do you see some?
     
  5. Mar 12, 2010 #4

    tiny-tim

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    Hi berkeman! :wink:

    Yes, just above where I'm now typing, on the Reply to Thread page. :smile:
     
  6. Mar 12, 2010 #5

    berkeman

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    Hmm. I see this instead. Wonder what I need to do to see the tags...

    How many do you see?
     
  7. Mar 12, 2010 #6

    tiny-tim

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    ah, you're still on the main page, i'm on the Reply to Thread page (click "QUOTE" or "Go Advanced") :wink:
     
  8. Mar 12, 2010 #7

    berkeman

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    Ohhh!! I understand now. Thanks.

    [/hijack]
     
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