Hello farnazhd66
If you look at the Physics setup options, it can be seen that you can specify either current or voltage. See below snapshot. You can define current at one terminal and voltage at another terminal.
I would recommend you to go through the Electromagnetics simulation examples posted at below links to get an idea on the physics setup:
https://discoveryforum.ansys.com/t/y7dvbr
https://discoveryforum.ansys.com/t/m2v4w4/discovery-aim-tutorials-from-cornell-university
You are navigating away from the AIS Discovery experience