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

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Applying Kirchhoff's Current Law (KCL) to a transistor involves understanding that it acts as a single node where the net current is the sum of charge carriers moving in one direction. Transistors do not function as sources or sinks for electrons; instead, they facilitate the combination of holes (positive charge) and electrons (negative charge) at the junction in a 1:1 ratio. This results in a net current that flows consistently in one direction, either from holes to electrons or vice versa. The discussion emphasizes that despite the complexity of charge movement, KCL principles still apply. Overall, the behavior of charge carriers in a transistor aligns with KCL, reinforcing the concept of current conservation.
Phyman1109
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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
 
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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.
 
Oh...thanks.
 

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