【单选题】
In a three-phase circuit, the phase voltages are （）
A、120°apart
B、160°apart
C、180°apart
D、360°apart
查看正确答案A、dynamometer B、power factor meter C、three-phase motor D、polyphase voltmeter
搜题
更多“In a three-phase circuit, the phase voltages are （）”相关的问题
第2题
A、Each has three separate but identical armature windings acted on by one system of rotating magnets B、Each has one armature winding acted on by three identical but separate systems of rotating magnets C、All three-phase alternators are designed to operate with a O8 leading power factor D、The three phases always provide power to the load through three sets of slip rings and brushes
第3题
A、The generator needs not excitation B、The winding on the rotor is for inputting excitation current C、There are three phase windings on the rotor D、The generator has brushes
第5题
A、both generate alternating voltages B、both rectify the voltage before delivery C、are constructed at the same physical size for the same kilowatt rating D、both supply three-phase power
第7题
A、A.AC voltage to the armature B、B.AC voltage to the field C、C.DC voltage to the armature D、D.DC voltage to the field
第9题
A、Optional authentication phase, link establishment phase, network layer protocol phase. B、Network layer protocol phase, link establishment phase, optional authentication phase. C、Network layer protocol phase, optional authentication phase, link establishment phase. D、Link establishment phase, network layer protocol phase, optional authentication phase. E、Link establishment phase, optional authentication phase, network layer protocol phase. F、Optional authentication phase, network layer protocol phase, link establishment phase.
