| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
The valence shell of a semiconductor is how full of electrons?
empty |
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less than half full |
|
more than half full |
|
half full |
Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.
Which of the following statements about electrical resistance is true?
electrically conductive materials have no resistive properties |
|
the less resistive the conductor is the slower electron flow will be |
|
the more resistive the conductor is the faster electron flow will be |
|
the more resistive the conductor is the slower electron flow will be |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
A transistor works by allowing a small amount of current to control general current flow. Where is the small amount of current applied?
collector |
|
emitter |
|
input |
|
base |
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.
The valence shell of n insulator is how full of electrons?
more than half full |
|
empty |
|
less than half full |
|
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.
A solid state device has which of the following characteristics?
made entirely from conductive material |
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made entirely from insulative material |
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made entirely from semiconductor material |
|
made from a mix of conductive and insulative material |
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.