STEM Question 1: How can we construct a series circuit that has two functioning lights and a switch? A series circuit with two functioning lights and a switch can be easily constructed using four wires, a switches, a battery/transformer or other power source and two light globes. The first wire is connected from the power source to the switch. From here, the switch is connected to the first light, which is then connected to the second light, before being connected back to the power source. Being a series circuit and through the use of a single wire, the electrons only have one possible conductor to flow through. This means that all lights in the circuit will be activated when the switch is turned on. The completed circuit is illustrated below and can also be viewed at 6:30 of the “Using the School Electrical Kits” video. STEM Question 2: Why do we use electrical circuit diagrams? Electrical diagrams are used over regular drawings or sketches as it creates a well-structured, neat and clear diagram that is easy to interpret. Rather than have to guess what the illustrator is trying to draw with a regular sketch, circuit symbols are used in electrical diagrams and they are easy to draw and interpret. Another benefit of circuit diagrams is that wires are set out in straight lines, allowing for easier recreation when it comes to constructing the circuit in real life. STEM Question 3: How can a circuit be made that allows two bulbs to be switched on and off independently? A circuit can be constructed with two bulbs that are activated independently through the use of diodes. Diodes are a component that only allow electricity to flow in certain directions. This means that through the proper implementation of a diode, you can set up a singular circuit with two lights, each activated by their own switch. A quick example of this is evident in the “Two switch, two light circuit explained” video below.
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