| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.85 |
| Score | 0% | 77% |
The rate of flow of electrons per unit time is which of the following?
conductance |
|
resistance |
|
current |
|
voltage |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.
What type of current flows in only one direction in a circuit?
parallel |
|
alternating |
|
series |
|
direct |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.
| 100 Ω | |
| 90 Ω | |
| 110 Ω | |
| 103 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 = \( \frac{V}{I} \) = \( \frac{400}{4} \) = 100 Ω
A transistor to an electronic circuit is like a _______________ to a house?
safe |
|
gate |
|
driveway |
|
no trespassing sign |
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 hertz is a unit of measurement for:
frequency |
|
energy |
|
power |
|
inductance |
The hertz is a unit of measurement for frequency.