| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
Capacitors are charged by what type of current?
alternating |
|
low voltage |
|
high voltage |
|
direct |
Capacitors store voltage and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
What type of current flows in only one direction in a circuit?
alternating |
|
parallel |
|
direct |
|
series |
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.
You would measure the amount of resistance at a certain point in a circuit with a(n):
potentiometer |
|
ohmmeter |
|
ammeter |
|
voltmeter |
Resistance is opposition to the flow of current and is measured in ohms (Ω). An ohmmeter is used to measure the amount of resistance at a certain point in a circuit.
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
double |
|
triple |
|
more than |
|
less than |
The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.
This circuit component symbol represents a(n):
AC source |
|
transformer |
|
DC source |
|
capacitor |
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.