| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.55 |
| Score | 0% | 71% |
The ohm is a unit of measurement for:
energy |
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capacitance |
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power |
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resistance |
Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.
An engineer who wants to document an electric circuit would create which of the following?
a matrix |
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a schematic |
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a blueprint |
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a layout |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Direct current flows from the __________ terminal of the voltage source to the __________ terminal.
negative, positive |
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positive, negative |
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negative, negative |
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positive, positive |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.
The most common circuit configuration is:
parallel |
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series-parallel |
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series |
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household |
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.
| 180 W | |
| 90 W | |
| 89 W | |
| 45 W |