| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
A diode to an electronic circuit is like a _______________ to a city?
highway |
|
one-way street |
|
traffic light |
|
parking lot |
A diode allows current to pass easily in one direction and blocks current in the other direction.
A capacitor to an electronic circuit is like a _______________ to a house?
driveway |
|
storage shed |
|
gate |
|
safe |
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.
The conductivity of an element depends on how many electrons occupy which electron shell?
outer |
|
inner |
|
first |
|
middle |
All electricity is the movement of electrons which are subatomic particles that orbit the nucleus of an atom. Electrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer (valence) electron shell.
The valence shell of n insulator is how full of electrons?
more than half full |
|
empty |
|
less than half full |
|
half full |
Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.
The rate of flow of electrons per unit time is which of the following?
voltage |
|
conductance |
|
current |
|
resistance |
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.