| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
The farad is a unit of measurement for:
inductance |
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capacitance |
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power |
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energy |
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 are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
What is the voltage of most household electrical systems in the United States?
60V |
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220V |
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60Hz |
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110V |
Most households use electricity with a voltage of 110V.
The valence shell of n insulator is how full of electrons?
more than half full |
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half full |
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less than half full |
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empty |
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.
Which of the following allows encapsulating complex circuit designs for easier integration into electronic devices and machines?
integrated circuits |
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series-parallel circuits |
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parallel circuits |
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series circuits |
Circuits containing transistors are packaged into integrated circuit chips that allow encapsulating complex circuit designs (CPU, memory, I/O) for easier integration into electronic devices and machines.
Why is an insulator a poor conductor of electricity?
an insulator has many free electrons |
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an insulator has few free electrons |
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an insulator is made of inorganic material |
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an insulator is made of organic material |
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.