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Finding currents in a circuit

  1. Oct 1, 2009 #1
    RW-25-48.jpg

    1. In the circuit of the figure, find the current supplied by the battery.

    2. Find the current through the 6[tex]\Omega[/tex] resistor.


    Attempt at a solution:

    To find the total current supplied by the battery I tried:

    [tex]\frac{6*4*2}{6+4+2}[/tex] = 4[tex]\Omega[/tex]

    Then I did that resistance in series with the other:

    4 + 1 = 5[tex]\Omega[/tex]

    Then I figured to find the current I would use I=[tex]\frac{V}{R}[/tex] giving I=[tex]\frac{6}{5}[/tex]. But 6/5 is not the answer for part A apparently. And I have no idea how to get part B.
     
  2. jcsd
  3. Oct 1, 2009 #2
    To find the total current in the circuit provided by the battery, you need the total resistance. Have you learned the equations for combining resistors in series/parallel? You use that to determine the total effective resistance for the parallel section if it was replaced by a single resistor in series. Then combine that value with the 1ohm one in series.

    To find the current through a resistor in parallel, you need to know how current is split in parallel circuits.
     
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