| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| 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 matrix |
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a blueprint |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Which of the following is not true about a line drop?
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 addressed by raising voltage and lowering current across the transmission 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 component symbol represents a(n):
DC source |
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AC source |
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transformer |
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transistor |
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.
Which of the following is a difference between a circuit breaker and a fuse?
all of these |
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a circuit breaker can be reused |
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a fuse is cheaper than a circuit breaker |
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a fuse responds more quickly than a circuit breaker |
Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.
The conversion of alternating current (AC) into direct current (DC) is called:
reactance |
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capacitance |
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rectification |
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inductance |
A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.