Basic Electricity

Discussion in 'Homework Help' started by 55bulldog, Dec 26, 2008.

  1. 55bulldog

    Thread Starter New Member

    Dec 26, 2008
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    What is the total resistance in a circuit having 3 feet of 10-ohm/ft wire, with two 15-ohm resistors wired in parallel? I used the formula; Rtotal=R1XR2/R1+R2 & got 7.5ohms. 7.5ohms is not one of the choices for an answer. I went back over the text & did not find anything to help find another answer. I am not sure how nor if the wire length & resistance should figure into the problem solving.
     
    Last edited: Dec 26, 2008
  2. 55bulldog

    Thread Starter New Member

    Dec 26, 2008
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    A Little Help?
     
  3. bertus

    Administrator

    Apr 5, 2008
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  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    Don't forget that there is a series resistance in circuit - something about that wire having several ohms/foot.
     
  5. 55bulldog

    Thread Starter New Member

    Dec 26, 2008
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    Thanks for the help. I will try to change my posting so that the time stamp will show.
     
  6. Wendy

    Moderator

    Mar 24, 2008
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    Hint: 3 ft of 10Ω/ft wire is how many ohms?
     
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