| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
Direct current flows from the __________ terminal of the voltage source to the __________ terminal.
negative, positive |
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negative, negative |
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positive, positive |
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positive, negative |
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.
Longer the electrical wires mean _______________ voltage drop.
diminishing |
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complete |
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greater |
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lesser |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.
Which of the following is not a terminal on a transistor?
emitter |
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input |
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base |
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collector |
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.
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 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 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.
This circuit diagram represents a(n):
parallel circuit |
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series circuit |
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rectifier |
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series-parallel circuit |
In a parallel circuit, each load occupies a separate parallel path in the circuit and the input voltage is fully applied to each path. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present.