| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
The electrical potential difference between two points is called:
current |
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voltage |
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conductance |
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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.
In an electronic circuit, a thermocouple can be used to:
increase or decrease the temperature of a component in the circuit |
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link the temperature of one component in the circuit to that of another component in the circuit |
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open or close a circuit at a designated temperature |
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keep the circuit at a designated safe temperature |
A thermocouple is a temperature sensor that consists of two wires made from different conductors. The junction of these two wires produces a voltage based on the temperature difference between them and can be used like a switch to open or close the circuit at a designated temperature.
Which of the following statements about electrical resistance is true?
the more resistive the conductor is the faster electron flow will be |
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the less resistive the conductor is the slower electron flow will be |
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electrically conductive materials have no resistive properties |
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the more resistive the conductor is the slower electron flow will be |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
The rate of flow of electrons per unit time is which of the following?
conductance |
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voltage |
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resistance |
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current |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.
| 3600 W | |
| 1200 W | |
| 2400 W | |
| 7200 W |