A schematic is a diagram of an electrical circuit. Schematics are graphical representations of the essential connections in a circuit, but they are not life-like depictions of a circuit.
The user of the device could become a part of the devices electrical circuit by providing a return path for the electrons through the users body instead of the circuits earth ground. When our body becomes part of an electrical circuit, the user can be seriously shocked, or even killed by electrocution.
Going with the flow: Using analogies to explain electric circuits Going with the flow: Using analogies to explain electric circuits.
This open hands-on model building effectively combines theoretical and practical STEM skills. Analogies are ideal in supporting and complementing this practical model making and reinforcing the principles taught.