Talk:Analogue Electronics/pn Junctions

I would like to know more about this statement because this is never said in any of the textbooks that I refer to on this subject: "If the external potential is greater than the intenal potnetial, the barrier is reversed, and electronis and holes con flow virtually unimpeded through the junction - once the barrier voltage is exceeded, a very large current can flow." I am intrigued by the statement that the potential barrier is reversed.

Sridhar Chitta Assoc Professor and Head of the Department Electronics and Instrumentation Engg Vignan Institute of Tech and Science Deshmukhi, Nalgonda distt Hyderabad 508284 email: sridhar10chitta@yahoo.com