| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.76 |
| Score | 0% | 55% |
Which of the following statements about electrical resistance is true?
electrically conductive materials have no resistive properties |
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the more 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 less resistive the conductor is the slower electron flow will be |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
In an electronic circuit, a thermocouple can be used to:
increase or decrease the temperature of a 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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link the temperature of one component in the circuit to that of another 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 series?
the positive terminal of one battery is connected to the positive terminal of the next |
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total voltage equals the sum of the individual battery voltages |
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two connections are made between each adjacent battery |
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total voltage equals the average of the individual battery voltages |
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 series are that total voltage equals the sum of the individual battery voltages, total current equals the average of the individual battery currents, the positive terminal of one battery is connected to the negative terminal of the next, and one connection is made between each adjacent battery.
Which of the following is the preferred method for splicing wires?
screw-on connectors |
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wrap in small gauge wire |
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soldering |
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wire crimps |
Splicing is permanently joining two wires together. Splicing can be done with screw-on connectors or wire crimps but the preferred method for splicing is soldering. Soldering takes the most effort but results in a connection that is electrically and mechanically identical to the original wire.
Which of the following is not a common type of battery?
dry cell |
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deep-cycle |
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power-cycle |
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wet cell |
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 three most common types of batteries are dry cell (used in small devices like TV remotes), wet cell (used for cars), and deep-cycle (storage batteries used primarily for backup and emergency power).