1. The problem statement, all variables and given/known data I just need help understanding what establishes a positive charge on the top conductor in C1: http://imgur.com/fppHtMN [Broken] My book says that first there is a positive potential difference, Vab 2. Relevant equations 3. The attempt at a solution So since Vab is positive, a is at a higher potential. Does that mean the electrons from the top conductor of C1, move to point a which leaves a positive net charge? And my book also says that the negative charges from the bottom conductor of C2, acquires its negative charges from b. Are these electrons coming from the source that is providing the potential difference, such as a battery?