| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
Which of the following is not true about a line drop?
it is caused by resistance |
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it is addressed by raising voltage and lowering current across the transmission line |
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it is addressed by raising current and lowering voltage across the ransmission line |
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it is a decrease in voltage between two points on a 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:
amperes |
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volts |
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ohms |
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coulombs |
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.
Which of the following is not a terminal on a transistor?
collector |
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input |
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emitter |
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base |
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.
The sum of the voltage drops across each resistor in a __________ circuit will equal the total voltage applied to the circuit.
series-parallel |
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parallel |
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series |
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closed |
A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.
The ampere is a unit of measurement for:
inductance |
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power |
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energy |
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current |
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.