We use them in conjunction with solar-powered model car kits which students have to build themselves. These receive energy through solar powered panels allowing us also to teach ideas about renewable energy as well as electricity. The solar panels also allow us to integrate problem solving into lessons, with students having to investigate when panels work best.
The part of an electrical circuit that is between the electrons starting point and the point where they return to the source is called an electrical circuits "load".
circuit diagrams utilise special symbols recognized by everyone who uses the drawings. The symbols on the drawings show how components like resistors, capacitors, insulators, motors, outlet boxes, lights, switches, and other electrical and electronic components are connected together.
The current flowing in an electrical or electronic circuit can suddenly increase when a component part fails. This can cause serious damage to other components in the circuit, or create a fire hazard. To protect against this, a fuse or a device called a "circuit breaker" can be wired into a circuit.