| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
The formula specifying Ohm's law is which of the following?
V = I2R |
|
\(V = {I \over R}\) |
|
V = IR |
|
\(V = {R \over I}\) |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
This circuit component symbol represents a(n):
diode |
|
fuse |
|
capacitor |
|
resistor |
Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.
| 1800 W | |
| 1802 W | |
| 1803 W | |
| 1791 W |
A __________ electric current produces a magnetic field proportional to the amount of current flow.
low voltage |
|
moving |
|
stationary |
|
high voltage |
A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.
Electromotive force is another name for:
current |
|
power |
|
voltage |
|
energy |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.