I have the following doubts about a p-n junction diode:
1) If we short the diode ( connect it's terminals together without any power source) then how is the Kirchoff's law across the loop satisfied?
2) If the diode is forward bias, people say that the built in voltage Vin decreases by V. That is the new built in voltage is Vin-V. But what I don't get is shouldnt the voltage across the diode be V? How does a Kirchoff's voltage equation across the circuit look like?
3) Similarly, in reverse bias why does the applied voltage V add to the built in voltage? Shouldn't the voltage across the diode be V in the opposite direction? How does a Kirchoff's equation for this circuit look like?
Any help would be appreciated. Thanks :)