| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
The electrical potential difference between two points is called:
conductance |
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voltage |
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resistance |
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current |
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 electrical wiring, which of the following are proportional?
the diameter of the wire and the amount of the voltage |
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the diameter of the wire and the amount of the current |
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the length of the wire and the amount of the voltage |
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the length of the wire and the amount of the current |
Current flow through a wire increases the temperature of the wire. If too small a wire is used, the wire will heat up causing a loss in conductivity and possibly a fire. The thicker in diameter a wire is, the more current it can carry without overheating.
Electromotive force is another name for:
power |
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voltage |
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energy |
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current |
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.
Longer the electrical wires mean _______________ voltage drop.
lesser |
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greater |
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complete |
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diminishing |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.
From what energy do photovoltaic cells produce electrical energy?
sun |
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magnetic |
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nuclear |
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chemical |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.