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Applying kirchoff's current law on transistor considering it a single

  1. Oct 22, 2013 #1
    How can I apply kcl on transistor considering it as a single node since transistor can act as source or sink for electrons due to combination with holes
  2. jcsd
  3. Oct 23, 2013 #2
    Well current in = current out ... always.......

    A Transistor is NOT a source or sink for electrons - at the Junction holes ( + charge ) combine with electrons (- Charge) and the ratio is 1:1 - always.... so net current is charge moving in a single direction.

    Consider Holes + charge moving ---> (left to right) to the junction compared with Electrons moving <---- to the junction ( right to left ) ... the net current ( think charge x direction) is all moving the same direction.
  4. Oct 24, 2013 #3
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