| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
This circuit component symbol represents a(n):
transformer |
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resistor |
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inductor |
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capacitor |
An inductor is coiled wire that stores electric energy in the form of magnetic energy and resists changes in the electric current flowing through it. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC.
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 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 |
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a rectifier converts an AC input to DC while an inverter converts a DC input to AC |
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.
A diode to an electronic circuit is like a _______________ to a city?
highway |
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one-way street |
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parking lot |
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traffic light |
A diode allows current to pass easily in one direction and blocks current in the other direction.
Which of the following statements about electrical resistance is true?
the more resistive the conductor is the slower electron flow will be |
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the less resistive the conductor is the slower electron flow will be |
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electrically conductive materials have no resistive properties |
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the more resistive the conductor is the faster 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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current is naturally hot |
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voltage is naturally hot |
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the wire in the circuit burns when current passes through |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.