| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.62 |
| Score | 0% | 72% |
Which of the following is a difference between a circuit breaker and a fuse?
all of these |
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a fuse responds more quickly than a circuit breaker |
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a fuse is cheaper than a circuit breaker |
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a circuit breaker can be reused |
Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.
| series-parallel | |
| series | |
| parallel | |
| orthogonal |
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 120V 10A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 100A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 60V 50A configuration.
The joule is a unit of measurement for:
capacitance |
|
resistance |
|
energy |
|
power |
The joule is a unit of measurement for energy.
Resistance and current are __________ proportional.
not |
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exponentially |
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directly |
|
inversely |
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.
The ohm is a unit of measurement for:
resistance |
|
power |
|
energy |
|
capacitance |
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.