1. The problem statement, all variables and given/known data Find V and I in the following diagram: 3. The attempt at a solution I know what the answer is. Diode D2 is off but why? Now if the voltage left of D2 was +4V then diode D2 is off because +4V dominates +3V so the current runs right and thus turns off D2. Is this correct? Is this how ideal diodes work? Thanks!