| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.82 |
| Score | 0% | 76% |
You would measure the amount of voltage between two points in a circuit with a(n):
ammeter |
|
reostat |
|
battery |
|
voltmeter |
Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.
| orthogonal | |
| series | |
| series-parallel | |
| perpendicular |
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 25A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 9V 250A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 45V 125A configuration.
The hertz is a unit of measurement for:
inductance |
|
power |
|
energy |
|
frequency |
The hertz is a unit of measurement for frequency.
| 237.5 V | |
| 427.5 V | |
| 480 V | |
| 475 V |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
V = \( I \times R \) = \( 9.5 \times 50 \) = 475 V
Capacitors are charged by what type of current?
alternating |
|
high voltage |
|
direct |
|
low voltage |
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.