# How to interpret this drawing (diode circuit)?

I need help how to interpret this drawing of a diode circuit.

I don't understand the voltage $V$ after the resistor. Does it mean that $V$ is a voltage source connected to the ground (right picture)?

And is $I=\frac{3V-V}{10k\Omega}$ or $I=\frac{3V}{10k\Omega}$ ?

Thanks!

• In these drawing "V" is meant to be the voltage at that node. IE if you put a probe from your voltmeter – Tyler Mar 30 '17 at 19:03
• 'V' is just a label. – brhans Mar 30 '17 at 19:07
• V is designating a voltage out. What voltage will you see at the node labeled V? – DerStrom8 Mar 30 '17 at 19:17