Describe the change in the current through the bulb. Two flashlight bulbs are powered by separate, identical 9-volt batteries. One bulb is dimmer. Everything contains electrical charges - people, trees, cats, and minerals. Thales, a Greek who lived around 600 B.C.E., was one of the first to describe a phenomenon related to electricity.
Lightning is a very dramatic form of static electricity.
A chemical reaction in a battery adds potential energy as it separates charges. When charges move through a bulb, their electrical potential energy is converted into thermal energy and light. Current is equal to the potential difference divided by the resistance.