1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Circuit Problem

  1. Apr 2, 2009 #1
    1. The problem statement, all variables and given/known data

    This is the circuit in question. # 31. R1-R3 = 2 Ohms R4=16Ohms R5= 8 Ohms
    R6=4Ohms i6=1.4Amps

    2. Relevant equations


    3. The attempt at a solution

    I see R5 and R6 as being in series, therefore r5*i6=11.2V

    Then I add them together=16.8V

    Since I see the rest of the circuit in Parralel the voltages should be equal to one another so I take 16.8*3=50.4V

    The back of the book says 48.3V

    Any idea on what concept I may be missing?

    Thank You very much in advance.

    Attached Files:

    Last edited: Apr 2, 2009
  2. jcsd
  3. Apr 2, 2009 #2


    User Avatar
    Homework Helper

    Use branch current formula. If R1 and R2 are in parallel connection with I1 and I2 current, total current = I1 + I2. Then I1 = IR2/(R1 + R2)
    Use this formula for each loop and solve for E.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Circuit Problem Date
RC Circuit Problem Feb 25, 2018
Norton equivalen circuit problem Sep 20, 2017
Wye-Delta and Series-Parallel Circuit Problem Aug 26, 2017
RC circuit problem Aug 23, 2017