| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
A diode to an electronic circuit is like a _______________ to a city?
traffic light |
|
parking lot |
|
highway |
|
one-way street |
A diode allows current to pass easily in one direction and blocks current in the other direction.
Which of the following is not a characteristic of a step-up transformer?
has more turns in the secondary winding than in the primary winding |
|
increases voltage |
|
the secondary voltage is higher than the primary voltage |
|
the primary voltage is higher than the secondary voltage |
As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.
Voltage and current are __________ proportional.
not |
|
directly |
|
inversely |
|
indirectly |
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.
Electrons will flow as current from areas of __________ potential (concentration of electrons) to areas of __________ potential.
high, low |
|
high, high |
|
low, low |
|
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.