| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
The electrical potential difference between two points is called:
current |
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conductance |
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voltage |
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resistance |
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.
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
triple |
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less than |
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more than |
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double |
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 |
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transformer |
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DC source |
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transistor |
In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.
You would measure the amount of voltage between two points in a circuit with a(n):
battery |
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voltmeter |
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reostat |
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ammeter |
Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.
| 55 Ω | |
| 50 Ω | |
| 75 Ω | |
| 52 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 = \( \frac{V}{I} \) = \( \frac{150}{3} \) = 50 Ω