| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.95 |
| Score | 0% | 59% |
Which of the following is not a terminal on a transistor?
collector |
|
base |
|
input |
|
emitter |
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.
This circuit component symbol represents a(n):
fuse |
|
potentiometer |
|
capacitor |
|
diode |
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
In metals, increasing the temperature typically _____________ conductivity.
eliminates |
|
increases |
|
does nothing to |
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decreases |
All conductors have resistance and the amount of resistance varies with the element. Metals exhibit increased resistance (and, therefore, lower conductivity) as their temperature increases.
An engineer who wants to document an electric circuit would create which of the following?
a blueprint |
|
a layout |
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a schematic |
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a matrix |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Which of the following is not a characteristic of a step-up transformer?
increases voltage |
|
the secondary voltage is higher than the primary voltage |
|
has more turns in the secondary winding than in the primary winding |
|
the primary voltage is higher than the secondary 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.