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Homework Help: How to calculate voltage at a specific resistor

  1. Jun 1, 2010 #1
    1. The problem statement, all variables and given/known data

    How would you calculate the voltage at a specific resistor given that it's a parallel circuit.
     
    Last edited: Jun 1, 2010
  2. jcsd
  3. Jun 1, 2010 #2

    tiny-tim

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    Welcome to PF!

    Hi Gardalay! Welcome to PF! :smile:

    Use Kirchhoff's rules to find the current through it, and then use Ohm's law :wink:

    (but what exactly is the question?)
     
  4. Jun 1, 2010 #3
    If the 25ohm resistor in figure19-39 were shorted out, what then would be the current through the 10ohm resistor?
     

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  5. Jun 1, 2010 #4

    tiny-tim

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    Call the currents through each section i1 i2 i3 etc, and apply Kirchhoff's rules …

    what do you get? :smile:
     
  6. Jun 1, 2010 #5
    I got 7.14amps with the 25ohm resistor and 6.9amps without the 25ohm resistor.
     
  7. Jun 1, 2010 #6

    tiny-tim

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    Show your calculations if you want us to check them! :smile:
     
  8. Jun 1, 2010 #7
    ok, i finally got this figured out, thanks for the help
     
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