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Circuits! help

  1. Mar 20, 2009 #1
    1. The problem statement, all variables and given/known data

    http://img25.imageshack.us/img25/5953/elek.png [Broken]


    2. Relevant equations

    v=IR

    3. The attempt at a solution
    I have tried finding the total resistance of the circuit and then applying ohms law. My answer is 0.65 Amps but thats incorrect.

    Any help is much appreciated!
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 20, 2009 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi qwerty2x! :wink:

    Show us your full calculations, and then we can see what went wrong, and we'll know how to help! :smile:
     
  4. Mar 20, 2009 #3
    Use the equivalent resistance formulas and then Ohm's Law

    For two resistors in series [tex]R_{eq} = R_{1} + R_{2}[/tex]
    For two resistors in parallel [tex]\frac{1}{R_{eq}} = \frac{1}{R_{1}} + \frac{1}{R_{2}}[/tex]

    or two resistors in parallel simplified [tex]R_{eq} = \frac{R_{1}R_{2}}{R_{1}+R_{2}}}[/tex]

    Hope this helps!
     
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