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Homework Help: DC Circuits Question (internal resistance)

  1. Feb 3, 2010 #1
    1. The problem statement, all variables and given/known data

    Determine the magnitudes and directions of the currents through R1 and R2 in Fig. 19-47, where R1 = 37 and R2 = 16 .

    Figure 19-47
    (image attached)

    V1 = 9.0 V
    V3 = 6.0 V
    R1 = 37 [tex]\Omega[/tex]
    R2 = 16 [tex]\Omega[/tex]

    2. Relevant equations

    V = IR

    3. The attempt at a solution

    V = IR
    6.0 V = (37[tex]\Omega[/tex]) I
    .16216 A = I [tex]_{}1[/tex](correct)

    V = IR
    6.0 = (16[tex]\Omega[/tex]) I
    .375 A = I[tex]_{}2[/tex] (incorrect)

    Attached Files:

  2. jcsd
  3. Feb 3, 2010 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    That's weird, I would say I1 is incorrect and I2 is correct. Did you get the 16Ω and 37Ω values reversed perhaps?

    Kirchof's Voltage Law (KVL) would be useful here.
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