| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.91 |
| Score | 0% | 58% |
| series-parallel | |
| perpendicular | |
| orthogonal | |
| series |
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 15A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 9V 150A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 45V 75A configuration.
The formula specifying Ohm's law is which of the following?
\(V = {I \over R}\) |
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\(V = {R \over I}\) |
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V = I2R |
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V = IR |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
Which of the following is not a characteristic of a step-up transformer?
the primary voltage is higher than the secondary voltage |
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has more turns in the secondary winding than in the primary winding |
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increases voltage |
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the secondary voltage is higher than the primary voltage |
As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.
In an electronic circuit, a thermocouple can be used to:
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 |
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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.
The valence shell of a conductor is how full of electrons?
less than half full |
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full |
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half full |
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more than half full |
Conductors are elements that allow electrons to flow freely. Their valence shell is less than half full of electrons that are able to move easily from one atom to another.