| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
This circuit component symbol represents a(n):
transformer |
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inductor |
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transistor |
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diode |
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.
Which of the following allows encapsulating complex circuit designs for easier integration into electronic devices and machines?
parallel circuits |
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integrated circuits |
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series circuits |
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series-parallel circuits |
Circuits containing transistors are packaged into integrated circuit chips that allow encapsulating complex circuit designs (CPU, memory, I/O) for easier integration into electronic devices and machines.
From what energy do photovoltaic cells produce electrical energy?
sun |
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magnetic |
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nuclear |
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chemical |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.
Which of the following is a difference between a circuit breaker and a fuse?
a circuit breaker can be reused |
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a fuse responds more quickly than a circuit breaker |
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all of these |
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a fuse is cheaper than a circuit breaker |
Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.
What is the voltage of most household electrical systems in the United States?
110V |
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60V |
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220V |
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60Hz |
Most households use electricity with a voltage of 110V.