| Term | Definition |
|---|
| short circuit | electricity can pass through the circuit without passing through the load |
| open circuit | an incomplete electrical circuit in which no current flows |
| closed circuit | a complete electrical circuit around which current flows or a signal circulates |
| troubleshooting | the process of analyzing a problem and finding a way to fix it |
| schematic diagram | graphic representation of an electric circuit or apparatus with standard symbols |
| input device | A device that allows a circuit to sense a change in the physical world, like a switch or light resistor. |
| output device | A device that allows a circuit to create a change in the physical world. like a motor or a light bulb. |
| signal | A pattern of physical changes that carries a message. |
| encode | convert a message into another representation. |
| decode | interpret coded information so the message can be "understood" and used. |
| digital signal | consist of only two states, on and off (0 and 1) |
| analog signal | a signal whose properties can change continuously in a given range. |
| FM | modulation of the frequency of the (radio) carrier wave |
| AM | modulation of the amplitude of the (radio) carrier wave |
| amplifier | electronic equipment that increases strength of signals passing through it |
| LED | Light Emitting Diode |
| Hertz | the frequency of a wave is measured in ---------- |
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