| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
What is the frequency of most household electrical systems?
110V |
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60Hz |
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60MHz |
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110Hz |
Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. Most households use electricity with a frequency of 60Hz.
This circuit diagram represents a(n):
parallel circuit |
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series circuit |
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series-parallel circuit |
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open circuit |
A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.
Capacitors connected in series produce __________ capacitance compared to capacitors connected in parallel.
no |
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less |
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more |
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the same |
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors connected in series produce less capacitance than capacitors connected in parallel.
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.
Which of the following is not a terminal on a transistor?
base |
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emitter |
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collector |
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input |
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.