| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.96 |
| Score | 0% | 59% |
A transistor to an electronic circuit is like a _______________ to a house?
driveway |
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safe |
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no trespassing sign |
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gate |
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. A transistor acts as a gate or switch for electronic signals.
What is the voltage of most household electrical systems in the United States?
60Hz |
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220V |
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60V |
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110V |
Most households use electricity with a voltage of 110V.
Which of the following is not true about a line drop?
it is addressed by raising current and lowering voltage across the ransmission line |
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it is caused by resistance |
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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 voltage and lowering current across the transmission line |
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.
Current is the rate of flow of electrons per unit time and is measured in:
coulombs |
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ohms |
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volts |
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amperes |
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.
This circuit component symbol represents a(n):
AC source |
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transformer |
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DC source |
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capacitor |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.