I am trying to find out why this system:
should have an Open Circuit Voltage of:
\$U = U0 + I0*R2 + 0*R3\$
\$ = U0 + I0R2\$
I understand why the R3 component doesn't change anything but I fail to understand why R1 isn't contributing anything.
To be clear with all of you. This is an old exam question that I'm using to study for the test but can't find the answer in either the textbook or in the lecture material.
Thanks in advance