在我国电力系统中,动力和照明用电的频率为()Hz,称工频,其周期为()s。
2023-11-02设备方向-通用基础
在我国电力系统中,动力和照明用电的频率为()Hz,称工频,其周期为()s。
A.60,0.015
B.60,0.020
C.50,0.020
D.50,0.015
正确答案是C

在我国电力系统中,动力和照明用电的频率为()Hz,称工频,其周期为()s。
A.60,0.015
B.60,0.020
C.50,0.020
D.50,0.015
正确答案是C