| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
Which of the following is a characteristic of batteries connected in series?
total voltage equals the sum of the individual battery voltages |
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the positive terminal of one battery is connected to the positive terminal of the next |
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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 same for each branch of a parallel circuit?
resistance |
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current |
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power |
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voltage |
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.
Which of the following statements about electrical resistance is true?
the more resistive the conductor is the faster electron flow will be |
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electrically conductive materials have no resistive properties |
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the less resistive the conductor is the slower electron flow will be |
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the more 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.
Why does current in an electric circuit create heat?
heat is created when the current overcomes resistance in the wire |
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the wire in the circuit burns when current passes through |
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voltage is naturally hot |
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current is naturally hot |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.
The valence shell of a semiconductor is how full of electrons?
half full |
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more than half full |
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empty |
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less than half full |
Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.