| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
The hertz is a unit of measurement for:
energy |
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inductance |
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frequency |
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power |
The hertz is a unit of measurement for frequency.
| 342 V | |
| 380 V | |
| 382 V | |
| 383 V |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
V = \( I \times R \) = \( 9.5 \times 40 \) = 380 V
The most common circuit configuration is:
household |
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series-parallel |
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series |
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parallel |
Circuits are not limited to only series or only parallel configurations. Most circuits contain a mix of series and parallel segments. A good example is a household circuit breaker. Electrical outlets in each section of the house are wired in parallel with the circuit breaker for that section wired in series making it easy to cut off electricity to the parallel parts of the circuit when needed.
The conductivity of an element depends on how many electrons occupy which electron shell?
outer |
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first |
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middle |
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inner |
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?
triple |
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more than |
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less 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.