1. The problem statement, all variables and given/known data Suppose that 2 identical photoelectric devices are connected to the same electrical circuit, and the devices are connected in parallel with each other. Compared to the voltage generated by a single device, the total voltage supplied by the parallel devices will be? 2. Relevant equations Errr, not entirely sure.... 3. The attempt at a solution This is an MCAT practice test question, and boy am I stumped. The answer is supposed to be "the same," but I don't know why. Are photoelectric devices similar to capacitors, or resistors, or are they a completely other creature? I figured that the voltage should have been half. The explanation behind the solution was given as: Identical voltage sources connected in parallel produce the same output voltage as a single source, whereas if they were connected in series, the source voltages would have been added. I am utterly confused. MCAT's are thursday morning, and I am hopeful to not get any questions like that one. I've never even heard of photoelectric devices, but I apparently should have! Any help, as always, is greatly appreciated.