| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
This circuit component symbol represents a(n):
capacitor |
|
DC source |
|
transformer |
|
AC source |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.
The rate of flow of electrons per unit time is which of the following?
resistance |
|
voltage |
|
current |
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conductance |
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.
A transistor to an electronic circuit is like a _______________ to a house?
driveway |
|
no trespassing sign |
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gate |
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safe |
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 acts as a gate or switch for electronic signals.
This circuit component symbol represents a(n):
transistor |
|
AC source |
|
transformer |
|
DC source |
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 joule is a unit of measurement for:
capacitance |
|
resistance |
|
energy |
|
power |
The joule is a unit of measurement for energy.