Chapter 2

Manipulating Electricity to Make Something Happen

In This Chapter

arrow Getting electrons mobilized

arrow Finding a source of electrical force

arrow Being positive about the direction of current

arrow Shedding light on a circuit in action

arrow Taking control over electron flow

arrow Sending current this way and that way

Electronics is all about controlling the flow of electrons (electric current) through conductors in a complete path (circuit) so that the electrical energy delivered to a load (such as a light bulb, motor, or speaker) is “shaped” in just the right way. By manipulating the flow of electrons, electronic components enable you to do some amazing things with electricity, such as vary the sound produced by speakers, change the direction and speed of motors, and control the intensity and timing of lights, among many other things. In other words, electronics doesn’t make electricity — it makes electricity ...

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