| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
Capacitors connected in series produce __________ capacitance compared to capacitors connected in parallel.
more |
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no |
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less |
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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.
What is the primary difference between a rectifier and an inverter?
a rectifier converts a DC input to AC while an inverter converts an AC input to DC |
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a rectifier converts an AC input to DC while an inverter converts a DC input to AC |
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a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion |
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a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion |
A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.
Which of the following is not a purpose of a resistor in an electrical circuit?
moderate the heat in the circuit |
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control the voltage in the circuit |
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multiply the current in the circuit |
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limit the current in the circuit |
Resistors can be chosen in a wide variety of values to control the voltage in a circuit, limit the current, or moderate the heat produced by the components in the circuit.
The farad is a unit of measurement for:
inductance |
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energy |
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capacitance |
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power |
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.
A capacitor is often used for which of the following purposes?
as a primary power source |
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to convert alternating current into direct current |
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to allow a small amount of current to control a large amount of current |
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to maintain power in a circuit when the primary power source is disconnected |
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.