How do I find the Voltage of this circuit?
V will be about 2.4 V.
Let's discuss the top diode first. It will pass 2.4 V to its cathode. With +2.4 V on the cathode of the 2nd diode and only +2 V on its anode, the 2nd diode will be reverse biased and therefore no current will flow from thru the 2nd diode. For the same reason, the 3rd diode will also be reverse biased and will pass no current.
The current flowing thru the first diode will all flow thru the resistor producing the 2.4 V. Therefore Ohm's Law tells us that the current thru the first diode will be about 2.4 ma.
I hope this helps,