| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
You would measure the amount of voltage between two points in a circuit with a(n):
reostat |
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ammeter |
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battery |
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voltmeter |
Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.
Inductance is a factor in which of the following?
an AC circuit |
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batteries connected in serial |
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a DC circuit |
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determining energy stored by a capacitor |
Inductance is a property of an AC circuit (or a component in an AC circuit) that quantifies resistance to changes in current. The current in an AC circuit is continuously changing and inductive reactance (the opposition to change) depends both on the inductance of the circuit or component and the rate at which the current is changing.
The ohm is a unit of measurement for:
energy |
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power |
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resistance |
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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.
Why does current in an electric circuit create heat?
heat is created when the current overcomes resistance in the wire |
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the wire in the circuit burns when current passes through |
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voltage is naturally hot |
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current is naturally hot |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.
| parallel | |
| perpendicular | |
| series-parallel | |
| series |
Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 96V 10A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 80A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 48V 40A configuration.