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Quick Question about a circuit

  1. Nov 3, 2008 #1
    circuit.jpg 1. The problem statement, all variables and given/known data

    For the circuit in the picture, could somebody explain to me why the current on the upper left side of the circuit is the same as the current in the upper right ( I1)?
  2. jcsd
  3. Nov 3, 2008 #2
    Any thoughts about this ?
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