Part I: How does changing the voltage of the power source change the brightness of a bulb, and the current that is flowing? 1. Place a battery on the board, and connect it to a wire, then one light bulb, then another wire, then back to the battery. Screenshot your pic, and insert that picture HERE. 2. Double click on the battery, and you will be able to drag the voltage larger and smaller. Experiment with that. You can drag the ammeter over the wire leaving the battery to measure the current. a. When the voltage of the battery is high, the electrons flow (quickly/slowly), the current gets (bigger/smaller), and the bulb shines more (brightly/dimly). b. When the voltage of the battery is low, the electrons flow (quickly/slowly), the current gets (bigger/smaller), and the bulb shines more (brightly/dimly)