First time on this forum, hoping you can help clear something up for me. I am using the Van der Pauw method to characterize the sheet resistance of a metal film. In the standard setup, current is pushed through two contacts and voltage is measured across the other two contacts. My colleagues are insisting that reversing this setup, pushing a voltage and measuring a current, will produce the same results. But they haven't been able to explain why. Wouldn't this create a current divider? The measured current wouldn't be the same as the current crossing the square. I haven't been able to find any sources supporting this and they haven't been able to give me any. I'm also worried that since my films have a very low 2 pt probe resistance, the low impedance of the ammeter would add an error to the measurement. Any help clearing this up would be appreciated.