| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.78 |
| Score | 0% | 56% |
In an electronic circuit, a thermocouple can be used to:
open or close a circuit at a designated temperature |
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increase or decrease the temperature of a component in the circuit |
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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 |
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.
| 72V 10A | |
| 36V 40A | |
| 144V 160A | |
| 9V 80A |
Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 72V 10A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yielding a 9V 80A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 36V 40A configuration.
The valence shell of n insulator is how full of electrons?
empty |
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half full |
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less than half full |
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more than half full |
Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.
Longer the electrical wires mean _______________ voltage drop.
lesser |
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greater |
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diminishing |
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complete |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.
Which of the following is not a terminal on a transistor?
base |
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input |
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collector |
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emitter |
A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.