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what makes collector current to be beeta(current amplification factor) times base current?

what makes collector current to be beeta(current amplification factor) times base current? Is it because of shape of the transistor or doping? or Why it is acting as constant current source? or Why the collector current is independent on collector resistor and Vcc(voltage across collector and emitter)?

rickharris5 years ago
+1 good explanation as well.
AndyGadget5 years ago
 
It looks like you need to read a primer on transistor theory.