If 2 circuits are connected by a single wire, will there be current in the wire? If there is current, it can only goes throgh one way (ex: right or left) . In a 2 circuits like the example, [PLAIN]http://img594.imageshack.us/img594/838/imagemgpp.png [Broken] Where c and d are generators, e/f/g resistors. The wire AB is inicially unplugged and then plugged. In which case of voltage of the generators/resistance of the capacitors There would be current i n AB and in which case there wouldn't be? What would happen if c or d were capacitors?