| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
What is the voltage of most household electrical systems in the United States?
60Hz |
|
60V |
|
110V |
|
220V |
Most households use electricity with a voltage of 110V.
| 75V 75A | |
| 150V 15A | |
| 15V 150A | |
| 300V 300A |
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 150V 15A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yielding a 15V 150A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 75V 75A configuration.
The valence shell of n insulator is how full of electrons?
more than half full |
|
half full |
|
empty |
|
less than 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.
Which of the following will help to prevent a short circuit?
fuse |
|
transistor |
|
resistor |
|
diode |
Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.
From what energy do photovoltaic cells produce electrical energy?
nuclear |
|
magnetic |
|
chemical |
|
sun |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.