| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
Using a fuse with a current rating higher than that required by a circuit:
is required |
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is recommended |
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makes no difference |
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makes the circuit less safe |
A fuse is a type of low resistance resistor that stops current flow in a circuit in response to a larger than intended electric current flow. Using a fuse with a higher current rating than required by a circuit is less safe as it could potentially allow overcurrent and risk a fire or heat-related equipment damage.
In an electronic circuit, a thermocouple can be used to:
link the temperature of one component in the circuit to that of another component in the circuit |
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keep the circuit at a designated safe temperature |
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open or close a circuit at a designated temperature |
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increase or decrease the temperature of a component in the circuit |
A thermocouple is a temperature sensor that consists of two wires made from different conductors. The junction of these two wires produces a voltage based on the temperature difference between them and can be used like a switch to open or close the circuit at a designated temperature.
Which of the following is a characteristic of batteries connected in parallel?
total current equals the sum of the individual battery currents |
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one connection is made between each adjacent battery |
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total current equals the average of the individual battery currents |
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the positive terminal of one battery is connected to the negative terminal of the next |
You can multiply the voltage or the current supplied by individual batteries by connecting them together either in series or in parallel. The characteristics of batteries connected in parallel are that total voltage equals the average of the individual battery voltages, total current equals the sum of the individual battery currents, the positive terminal of one battery is connected to the positive terminal of the next, the negative terminal of one battery is connected to the negative terminal of the next, and two connections are made between each adjacent battery.
Which of the following statements about electrical resistance is true?
the less resistive the conductor is the slower electron flow will be |
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the more resistive the conductor is the faster electron flow will be |
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the more resistive the conductor is the slower electron flow will be |
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electrically conductive materials have no resistive properties |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
You would measure the amount of current through a circuit with a(n):
battery |
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potentiometer |
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ammeter |
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voltmeter |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.