| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
From what energy do photovoltaic cells produce electrical energy?
sun |
|
chemical |
|
nuclear |
|
magnetic |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.
A transistor to an electronic circuit is like a _______________ to a house?
no trespassing sign |
|
gate |
|
safe |
|
driveway |
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.
Longer the electrical wires mean _______________ voltage drop.
lesser |
|
diminishing |
|
complete |
|
greater |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.
The valence shell of n insulator is how full of electrons?
empty |
|
more than half full |
|
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 joule is a unit of measurement for:
energy |
|
power |
|
capacitance |
|
resistance |
The joule is a unit of measurement for energy.