| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
This circuit diagram represents a(n):
rectifier |
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series circuit |
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series-parallel circuit |
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parallel circuit |
In a parallel circuit, each load occupies a separate parallel path in the circuit and the input voltage is fully applied to each path. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present.
The formula specifying Ohm's law is which of the following?
V = I2R |
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\(V = {I \over R}\) |
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\(V = {R \over I}\) |
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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.
Resistance is measured in:
coulombs |
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ohms |
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amperes |
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volts |
Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. 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 parallel?
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 |
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one connection is made between each adjacent battery |
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total current equals the sum of the individual battery currents |
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.