| 21. | An alternator is a type of alternating current ( AC ) electrical generator.
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| 22. | Alternating current and pulsed current is also possible but rarely used.
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| 23. | An integral alternating current generator produces 12 volts and 200 watts.
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| 24. | A substation was located in Marienfelde converted the direct current into alternating current.
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| 25. | Rotary style may be driven by direct current or alternating current electricity source.
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| 26. | Audio signals are alternating current and so are attenuated by inductance.
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| 27. | :: Security metal detectors use alternating current to detect conductive metals.
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| 28. | This coil was connected to an alternating current electrical power supply.
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| 29. | Modern Digital Command Control ( DCC ) systems use alternating current.
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| 30. | The electromagnetic vibrator consists of a coil that is energized by alternating current.
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