| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
Electrons will flow as current from areas of __________ potential (concentration of electrons) to areas of __________ potential.
low, low |
|
high, low |
|
high, high |
|
low, high |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.
The valence shell of a semiconductor is how full of electrons?
less than half full |
|
empty |
|
more than half full |
|
half full |
Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.
| 9.5 A | |
| 12.5 A | |
| 4.75 A | |
| 8.55 A |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
Solved for current, I = \( \frac{V}{R} \) = \( \frac{380}{40} \) = 9.5 A
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
less than |
|
triple |
|
double |
|
more than |
The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.
What is the voltage of most household electrical systems in the United States?
110V |
|
60V |
|
220V |
|
60Hz |
Most households use electricity with a voltage of 110V.