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}\$ ?

enter image description here


  • 3
    \$\begingroup\$ In these drawing "V" is meant to be the voltage at that node. IE if you put a probe from your voltmeter \$\endgroup\$ – Tyler Mar 30 '17 at 19:03
  • 1
    \$\begingroup\$ 'V' is just a label. \$\endgroup\$ – brhans Mar 30 '17 at 19:07
  • \$\begingroup\$ V is designating a voltage out. What voltage will you see at the node labeled V? \$\endgroup\$ – DerStrom8 Mar 30 '17 at 19:17

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