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Junction Rule

  1. Sep 24, 2006 #1
  2. jcsd
  3. Sep 25, 2006 #2

    Astronuc

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    Staff: Mentor

    The way the currents are written, I1 + I2 = I3. If E2 is sufficiently strong, the current I3 may be negative, indicating it is in the opposite direction as that which is written.

    If anything the current I2 should have been written in the opposite direction and it's polarity reversed, such that I1 = I2 + I3. By convention, currents are usually written in the clockwise direction of a loop. The + sign simply indicates a higher potential.
     
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