| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
less than |
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triple |
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double |
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more than |
The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.
What kind of diode allows current to flow in the opposite direction once a certain voltage threshold is reached?
standard diode |
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v-type diode |
|
light emitting diode |
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zener diode |
A diode allows current to pass easily in one direction and blocks current in the other direction. A zener diode is a diode which allows current to flow in one direction as normal and will also allow current flow in the reverse direction when the voltage is above a certain value. This value is called the breakdown voltage.
What is the voltage of most household electrical systems in the United States?
60Hz |
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110V |
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60V |
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220V |
Most households use electricity with a voltage of 110V.
Why does current in an electric circuit create heat?
current is naturally hot |
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voltage is naturally hot |
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heat is created when the current overcomes resistance in the wire |
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the wire in the circuit burns when current passes through |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.
An amplifier is most similar in function to which of the following:
step-up transformer |
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transistor |
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step-down transformer |
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capacitor |
An amplifier is a device that takes a small input signal and creates a larger output signal. This makes it most similar to a step-up transformer which takes a smaller input voltage and creates a larger output voltage.