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

[Phyman1109]

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

 

[Windadct]

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.

 

[Phyman1109]

Oh...thanks.