| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
What is the voltage of most household electrical systems in the United States?
110V |
|
60Hz |
|
60V |
|
220V |
Most households use electricity with a voltage of 110V.
| 100 Ω | |
| 110 Ω | |
| 50 Ω | |
| 101.5 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 = \( \frac{V}{I} \) = \( \frac{200}{2} \) = 100 Ω
Which of the following allows encapsulating complex circuit designs for easier integration into electronic devices and machines?
parallel circuits |
|
series circuits |
|
series-parallel circuits |
|
integrated circuits |
Circuits containing transistors are packaged into integrated circuit chips that allow encapsulating complex circuit designs (CPU, memory, I/O) for easier integration into electronic devices and machines.
Which of the following is not an advantage of semiconductors over conductors?
materials to produce semiconductors are cheap and abundant |
|
a semiconductor conducts current better than a conductor |
|
a semiconductor's conductivity can be varied under an external electrical field |
|
a semiconductor exhibits increased conductivity with increased temperatures |
A semiconductor is a material that has a limited ability to conduct electrical current with conductivity between that of an insulator and that of a conductor. Silicon, a cheap and abundant material, is the most used semiconductor material although other materials are used in the electronics components made from semiconductors. The primary advantages of a semiconductor over a conductor is that the conductivity of a semiconductor can be varied under an external electrical field giving engineers precise control over complex circuits and, unlike conductors like metals, a semiconductor's conductivity increases with increased temperatures.
| 1800 W | |
| 1792 W | |
| 1802 W | |
| 2700 W |