1. The problem statement, all variables and given/known data 2. Relevant equations KCL 3. The attempt at a solution I have some question for this circuit. http://img510.imageshack.us/my.php?image=questpt3.jpg I want to calculate the current I, my first thought was that it cant go any current because the potential difference is zero. But then I thought that the current source can produce a current even if there is zero potential, so there is a current I anyway. I am correct? I would appreciate some help.