| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
A transistor to an electronic circuit is like a _______________ to a house?
no trespassing sign |
|
gate |
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driveway |
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safe |
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.
One of the lights on your Christmas tree burns out and this causes the rest of the lights connected to that strand to go dark. How are the lights in that strand connected?
perpendicular |
|
series-parallel |
|
parallel |
|
series |
Lights connected in series form a chain with each light connecting to adjacent lights via one wire. Therefore, if one of the lights burns out and breaks the series, none of the other lights will receive power and they'll go dark. Lights connected in parallel each connect to the positive and negative nodes of the power source and would not go dark if one of their neighbors burnt out.
A diode to an electronic circuit is like a _______________ to a city?
traffic light |
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highway |
|
parking lot |
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one-way street |
A diode allows current to pass easily in one direction and blocks current in the other direction.
Which of the following is not a characteristic of a step-up transformer?
the primary voltage is higher than the secondary voltage |
|
increases voltage |
|
has more turns in the secondary winding than in the primary winding |
|
the secondary voltage is higher than the primary voltage |
As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.
Direct current flows from the __________ terminal of the voltage source to the __________ terminal.
positive, positive |
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negative, negative |
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positive, negative |
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negative, positive |
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.