I've been reviewing some past exam and stumbled across this question
So I need to find the current I through the middle diode and the voltage across the bottom left 10KΩ resistor.
To try solve this problem i used the technique, "assumed states for analysis of ideal switch model diode circuits" (not sure if thats the actual name of the technique).
So for my first state, i assumed that both D1 and D2 are on
Since the current are not negative for both diodes, the assumption for both diodes being on must be correct. Thus the required current across the diode is:
(15V - 11.25V)/10KΩ = 0.000375A
However upon looking the answers, it says that the current across the diode is 0A. This means that the diode is actually "off" (while the other diode is on), and thus my analysis is wrong.
Is there a problem with my reasoning or am i missing something crucial?
Thank you for your time!