I read the reply to this question but I cannot really make sense of it: In an NPN transistor, why doesn't current flow without applying a base voltage?
if I have a npn-transistor and and apply a voltage between emitter and collector which is let's say 10 V , why is no charge flowing from emitter to the base already?
As I understand the pn junction between base and collector, it is in reverse bias due to the external voltage and will not allow any holes from the base or electrons from the collector to cross the barrier. If due to a voltage between base and emitter bigger than 0.7 V however electrons flow into the base they can drain through the collector.
Now, why can't the applied emitter-collector voltage cause flow of electrons into the base (in a sense of pushing the electrons from the emitter over the potential barrier just as in a forward biased diode?) Then we would have free electrons in the base that could then flow to the collector.
Thank you for your help!