| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
An engineer who wants to document an electric circuit would create which of the following?
a schematic |
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a layout |
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a blueprint |
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a matrix |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Alternating current changes __________ many times each second.
period |
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direction |
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frequency |
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resistance |
In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.
The formula specifying Ohm's law is which of the following?
V = I2R |
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\(V = {R \over I}\) |
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\(V = {I \over R}\) |
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V = IR |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
The electrical potential difference between two points is called:
current |
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conductance |
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voltage |
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resistance |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.
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 |
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zener diode |
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light emitting 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.