| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.62 |
| Score | 0% | 72% |
You would measure the amount of voltage between two points in a circuit with a(n):
ammeter |
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voltmeter |
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battery |
|
reostat |
Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.
The electrical potential difference between two points is called:
conductance |
|
resistance |
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current |
|
voltage |
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.
| 60 Ω | |
| 63 Ω | |
| 61.5 Ω | |
| 90 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 = \( \frac{V}{I} \) = \( \frac{360}{6} \) = 60 Ω
Which of these materials is not a good conductor of electricity?
gold |
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tin |
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copper |
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air |
All conductors have resistance and the amount of resistance varies with the element. In general, metals make the best conductors of electricity and non-metals make the worst conductors of electricity.
Which of the following is not a terminal on a transistor?
collector |
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base |
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emitter |
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input |
A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.