| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
| 160 Ω | |
| 85 Ω | |
| 80 Ω | |
| 240 Ω |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
Solved for resistance, R = \( \frac{V}{I} \) = \( \frac{320}{4} \) = 80 Ω
Longer the electrical wires mean _______________ voltage drop.
greater |
|
complete |
|
lesser |
|
diminishing |
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 a semiconductor is how full of electrons?
more than half full |
|
empty |
|
half full |
|
less than 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.
General current flow in a transistor is from __________ to __________.
base, emitter |
|
base, collector |
|
collector, emitter |
|
collector, base |
The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. 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.
An engineer who wants to document an electric circuit would create which of the following?
a blueprint |
|
a layout |
|
a schematic |
|
a matrix |
A schematic is the proper name for a drawing of an electric or electronic circuit.