选择题：When an induction motor with 10 poles is supplied by 50Hz three-phase ac power source, the synchronous revolutions per minute is _____. (Synchronous r/min = 120 f/p) A、1000B、900C、700D、600
选择题：When an induction motor with 10 poles is supplied by 50Hz three-phase ac power source, the synchronous revolutions per minute is _____. (Synchronous r/min = 120 f/p)
A、1000
B、900
C、700
D、600
发布时间：2025-12-15 17:06:58
