| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.66 |
| Score | 0% | 73% |
A transistor to an electronic circuit is like a _______________ to a house?
gate |
|
no trespassing sign |
|
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.
The valence shell of n insulator is how full of electrons?
more than half full |
|
less than half full |
|
empty |
|
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 watt is a unit of measurement for:
energy |
|
resistance |
|
power |
|
frequency |
Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.
| 60 Ω | |
| 40 Ω | |
| 20 Ω | |
| 10 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 = \( \frac{V}{I} \) = \( \frac{20}{1} \) = 20 Ω
| 231 V | |
| 630 V | |
| 315 V | |
| 210 V |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
V = \( I \times R \) = \( 7 \times 30 \) = 210 V