| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
An engineer who wants to document an electric circuit would create which of the following?
a schematic |
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a blueprint |
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a layout |
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a matrix |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Which of these materials is not a good conductor of electricity?
gold |
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tin |
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air |
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copper |
All conductors have resistance and the amount of resistance varies with the element. In general, metals make the best conductors of electricity and non-metals make the worst conductors of electricity.
In an electrical circuit, resistors have fixed or __________ resistance.
dynamic |
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variable |
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series |
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parallel |
Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.
A solid state device has which of the following characteristics?
made from a mix of conductive and insulative material |
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made entirely from conductive material |
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made entirely from insulative material |
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made entirely from semiconductor material |
The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.
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