| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
Current is the rate of flow of electrons per unit time and is measured in:
coulombs |
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volts |
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ohms |
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amperes |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.
An engineer who wants to document an electric circuit would create which of the following?
a blueprint |
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a layout |
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a matrix |
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a schematic |
A schematic is the proper name for a drawing of an electric or electronic circuit.
This circuit component symbol represents a(n):
capacitor |
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inductor |
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potentiometer |
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resistor |
Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.
Which of the following is not a terminal on a transistor?
emitter |
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base |
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input |
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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.
A transistor works by allowing a small amount of current to control general current flow. Where is the small amount of current applied?
base |
|
input |
|
emitter |
|
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.