Term
| Alternating current can be defined as current that varies in what? |
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Definition
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Term
| Before a 120-volt dc source can be used to power a 12-volt load, the voltage must be reduced. Which of the following methods can be used? |
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Definition
| A resistor placed in series with the load |
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Term
| Alternating current has replaced direct currnet in modern transmission systems because it has what advantage? |
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Definition
| AC can be readily stepped up or down |
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Term
| A waveform is a graphic plot of what quantities? |
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Definition
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Term
| What property surrounds a current-carrying load? |
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Definition
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Term
| Which of the following statements accurately describes the magnetic field surrounding a current-carrying conductor? |
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Definition
| It is perpendicular to and equal along all parts of the conductor |
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Term
| When you grasp a coil in your left hand with your thumb pointing in the direction of the north pole, your fingers will be wrapped around the coil in the direction of the what? |
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Definition
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Term
| The power consumed in a conductor in realigning the atoms which set up the magnetic field is known as what type of loss? |
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Definition
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Term
| The magnetic field surrounding a straight conductor is (a) what shape, and (b) is in what position relative to the conductor? |
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Definition
| (a) Concentric circles (b) Perpendicular |
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Term
| What is the unit of measurement for frequency? |
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Definition
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