| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
Why does current in an electric circuit create heat?
heat is created when the current overcomes resistance in the wire |
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voltage is naturally hot |
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the wire in the circuit burns when current passes through |
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current is naturally hot |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.
Which of the following is not a purpose of a resistor in an electrical circuit?
moderate the heat in the circuit |
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control the voltage in the circuit |
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multiply the current in the circuit |
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limit the current in the circuit |
Resistors can be chosen in a wide variety of values to control the voltage in a circuit, limit the current, or moderate the heat produced by the components in the circuit.
The conductivity of an element depends on how many electrons occupy which electron shell?
first |
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inner |
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outer |
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middle |
All electricity is the movement of electrons which are subatomic particles that orbit the nucleus of an atom. Electrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer (valence) electron shell.
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
double |
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less than |
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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.
| 3000 W | |
| 3300 W | |
| 6000 W | |
| 4500 W |