K5-11
Simple model of a battery using a human as the source of energy.
The instructor acts as a "battery," raising the potential of the "electrons" (ball bearings or marbles). The electrical potential is expended as the balls flow down to a point of lower potential energy, whereupon the instructor (battery) raises them again to repeat the process. This serves as a simple schematic of the flow of energy in an electrical circuit.
K5, FS2