| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
The joule is a unit of measurement for:
capacitance |
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energy |
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resistance |
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power |
The joule is a unit of measurement for energy.
What is the potential difference in an electrical circuit a measure of?
the load at a specific location in the circuit |
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the resistance at a specific location in the circuit |
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the voltage at a specific location in the circuit |
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the current at a specific location in the circuit |
Electrons flow from an area of high concentration to an area of low concentration. A high voltage indicates a high concentration of electrons that creates a greater potential for electron flow than a low voltage. When applied to a load, voltage creates electricity and potential difference is the measure of voltage at a specific location in an electrical circuit.
The formula specifying Ohm's law is which of the following?
V = I2R |
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\(V = {R \over I}\) |
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V = IR |
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\(V = {I \over R}\) |
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):
transformer |
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capacitor |
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AC source |
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DC source |
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.
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
less than |
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double |
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more than |
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triple |
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.