How Adding Batteries Affects a Series Circuit

Next Generation Science

This educational science video demonstrates the principles of simple series circuits and the relationship between voltage and output intensity. Through a clear side-by-side experiment, the video investigates what happens to a sound buzzer when the number of batteries in a circuit is doubled. It provides a visual and auditory demonstration of how electrical components behave differently when power is increased. The content focuses on key physics concepts including circuit components (batteries, wires, switch, buzzer), series connections, and voltage. It introduces the specific vocabulary of "series circuits" and explains the causal link between adding power sources and the resulting increase in electrical flow (voltage), manifested here as a louder sound. This resource is highly valuable for elementary and middle school science classrooms as a digital lab demonstration. It allows teachers to show a safe, clear example of electricity experiments that might otherwise require specific hardware for every student. It serves as an excellent anchor for lessons on energy, circuit design, variables in scientific experiments, and the basic properties of electricity.