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AC = Alternating Current, continually changing direction.
发布时间:
2024-07-02 12:09:24
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相关试题
1.
Alternating Current (AC) always flows in the same direction.
2.
Rapid and interrupted current, flowing first in one direction. This current produces a mechanical action. 选项: A:Alternating current B:Direct current C: AC/DC D:short circuit
3.
The general frequency converter usually uses the AC-DC-AC mode to convert the power frequency alternating current into three-phase AC with adjustable frequency and voltage, that is, the power frequency alternating current at the power grid side is first rectified into direct current, and then the direct current is converted into the alternating current with controllable frequency and voltage.( ) 选项: A:对 B:错
4.
Direct Current (DC) flows one way, then the other way, continually reversing direction. 选项: A:正确 B:错误
5.
A power ( ) is an electric apparatus that changes direct current (DC) to alternating current (AC).选项: A: relay; B:inverter; C:charger; D:interface
6.
The major advantages of alternating current (AC)Over direct current (DC) is the fact that its current andVoltage can easily be increased or decreased 选项: A:by means of a inverter. B: by means of a rectifier. C:by means of a transformer.
7.
The function of direct current regulated power supply is to input an alternating current power of 220volts, so that it can output __________.选项: A: direct current 200 volts voltage B:alternating current 24 volts voltage C: alternating current 200 volts voltage D: direct current 24 volts voltage
8.
“Alternating current”can be translated into ( ).
9.
There are many advantages of the alternating current(交流电) ____ the direct current(直流电).
10.
The function of a ( ) is to convert alternating current to direct current. 选项: A、Transformer B、Rectifier C、Filter D、Voltage regulator
11.
The function of a ( ) is to convert alternating current to direct current.选项: A:Transformer; B:Rectifier; C:Filter; D:Voltage regulator
12.
The load converts current changes into voltage changes, which form the alternating outpur voltage When the base current increases, large proportionate increases occur in the collector current. 选项: A:正确 B:错误
13.
This current changing, the magnetic field will change as well.
14.
An electrical device that converts an alternating current into a direct one by allowing a current to flow through it in one direction only. 选项: A、Filter B、Inverter C、Regulator D、Rectifier
15.
The electrons first flow in one direction and then in the other in __________ current. A: direct B: alternating C: flowing D: sine wave
16.
智慧职教: One ( ) of 1000 VA nominal power transforms the direct current voltage from battery 1 into a single phase 115V, 400Hz, alternating current.
17.
The direction of current in a conductor is convertionally considered to be from the positive to the negative although the electrons do more in the opposite direction.
18.
Alternating current as a source of power has certain advantages over direct current. 前后两个下划线介词短语分别充当_______。选项: A:状语……状语 B:定语……定语 C:补语……定语 D:补语……状语
19.
智慧职教: ()的作用是将定子绕组产生的三相交流电变为直流电。The function of () is to change the three-phase alternating current generated by stator windings into direct current.
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