| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
The rate of flow of electrons per unit time is which of the following?
resistance |
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current |
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voltage |
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conductance |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.
| 27V 75A | |
| 9V 150A | |
| 54V 25A | |
| 6V 225A |
Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 54V 25A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yielding a 9V 150A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 27V 75A configuration.
A diode to an electronic circuit is like a _______________ to a city?
one-way street |
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highway |
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traffic light |
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parking lot |
A diode allows current to pass easily in one direction and blocks current in the other direction.
A __________ electric current produces a magnetic field proportional to the amount of current flow.
stationary |
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high voltage |
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low voltage |
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moving |
A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.
Which of the following is not true about a line drop?
it is addressed by raising voltage and lowering current across the transmission line |
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it is a decrease in voltage between two points on a line |
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it is addressed by raising current and lowering voltage across the ransmission line |
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it is caused by resistance |
Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. A line drop is a decrease in voltage between two points on an electrical transmission line due to resistance in the line. A lower current and higher voltage across the line will help compensate for the line drop.