| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
This circuit component symbol represents a(n):
inductor |
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transformer |
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transistor |
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diode |
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.
You would measure the amount of current through a circuit with a(n):
potentiometer |
|
battery |
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ammeter |
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voltmeter |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
double |
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less than |
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triple |
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more than |
The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.
From what energy do photovoltaic cells produce electrical energy?
magnetic |
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nuclear |
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chemical |
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sun |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.
The valence shell of a conductor is how full of electrons?
less than half full |
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full |
|
more than half full |
|
half full |
Conductors are elements that allow electrons to flow freely. Their valence shell is less than half full of electrons that are able to move easily from one atom to another.