| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
Why does current in an electric circuit create heat?
current is naturally hot |
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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 |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.
| perpendicular | |
| parallel | |
| series-parallel | |
| orthogonal |
Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 20A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 15V 120A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 45V 60A configuration.
What is the voltage of most household electrical systems in the United States?
220V |
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110V |
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60V |
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60Hz |
Most households use electricity with a voltage of 110V.
The farad is a unit of measurement for:
energy |
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inductance |
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capacitance |
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power |
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
You would measure the amount of resistance at a certain point in a circuit with a(n):
voltmeter |
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ohmmeter |
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potentiometer |
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ammeter |
Resistance is opposition to the flow of current and is measured in ohms (Ω). An ohmmeter is used to measure the amount of resistance at a certain point in a circuit.