| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.11 |
| Score | 0% | 62% |
Which of the following is not a terminal on a transistor?
input |
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base |
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emitter |
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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.
Why is an insulator a poor conductor of electricity?
an insulator has many free electrons |
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an insulator is made of inorganic material |
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an insulator has few free electrons |
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an insulator is made of organic material |
Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.
A transistor works by allowing a small amount of current to control general current flow. Where is the small amount of current applied?
input |
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base |
|
emitter |
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collector |
The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. 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.
Alternating current changes __________ many times each second.
frequency |
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direction |
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period |
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resistance |
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.
The valence shell of n insulator is how full of electrons?
more than half full |
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half full |
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empty |
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less than half full |
Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.