| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.10 |
| Score | 0% | 62% |
A capacitor is often used for which of the following purposes?
to convert alternating current into direct current |
|
to allow a small amount of current to control a large amount of current |
|
as a primary power source |
|
to maintain power in a circuit when the primary power source is disconnected |
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.
A transistor to an electronic circuit is like a _______________ to a house?
driveway |
|
no trespassing sign |
|
gate |
|
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.
The valence shell of a conductor is how full of electrons?
more than half full |
|
less than half full |
|
half full |
|
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.
Which of the following is the preferred method for splicing wires?
screw-on connectors |
|
wire crimps |
|
soldering |
|
wrap in small gauge wire |
Splicing is permanently joining two wires together. Splicing can be done with screw-on connectors or wire crimps but the preferred method for splicing is soldering. Soldering takes the most effort but results in a connection that is electrically and mechanically identical to the original wire.
A capacitor to an electronic circuit is like a _______________ to a house?
safe |
|
storage shed |
|
gate |
|
driveway |
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.